485BPOS

Registration Nos. 033-49581/811-7059

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549
FORM N-1A

REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 /X/

Post-Effective Amendment No. 34 /X/

and/or

REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940 /X/

Amendment No. 35 /X/

T. ROWE PRICE BLUE CHIP GROWTH FUND, INC.

Exact Name of Registrant as Specified in Charter

100 East Pratt Street, Baltimore, Maryland 21202
Address of Principal Executive Offices

410-345-2000
Registrant’s Telephone Number, Including Area Code

David Oestreicher

100 East Pratt Street, Baltimore, Maryland 21202
Name and Address of Agent for Service

It is proposed that this filing will become effective (check appropriate box):

/X/Immediately upon filing pursuant to paragraph (b)

//On (date) pursuant to paragraph (b)

//60 days after filing pursuant to paragraph (a)(1)

//On (date) pursuant to paragraph (a)(1)

//75 days after filing pursuant to paragraph (a)(2)

//On (date) pursuant to paragraph (a)(2) of Rule 485

If appropriate, check the following box:

//This post-effective amendment designates a new effective date for a previously filed post-effective amendment.

Page 2

EXHIBITS

Exhibit	Exhibit No.
XBRL Instance Document	EX-101.INS
XBRL Taxonomy Extension Schema Document	EX-101.SCH
XBRL Taxonomy Extension Calculation Linkbase Document	EX-101.CAL
XBRL Taxonomy Extension Definition Linkbase Document	EX-101.DEF
XBRL Taxonomy Extension Labels Linkbase Document	EX-101.LAB
XBRL Taxonomy Extension Presentation Linkbase Document	EX-101.PRE

Page 3

Signatures

Pursuant to the requirements of the Securities Act of 1933, as amended, and the Investment Company Act of 1940, as amended, the Registrant certifies that it meets all of the requirements for effectiveness of this Registration Statement pursuant to Rule 485(b) under the Securities Act of 1933 and has duly caused this Registration Statement to be signed on its behalf by the undersigned, duly authorized, in the City of Baltimore, State of Maryland, this December 21, 2015.

T. ROWE PRICE BLUE CHIP GROWTH FUND, INC.

/s/Edward C. Bernard

By:Edward C. Bernard

Chairman of the Board

Pursuant to the requirements of the Securities Act of 1933, as amended, this Registration Statement has been signed below by the following persons in the capacities and on the dates indicated:

Signature	Title	Date
/s/Edward C. Bernard	Chairman of the Board	December 21, 2015
Edward C. Bernard	(Chief Executive Officer)
/s/Catherine D. Mathews	Treasurer	December 21, 2015
Catherine D. Mathews	(Chief Financial Officer)
	and Vice President
*	Director	December 21, 2015
William R. Brody
*	Director	December 21, 2015
Anthony W. Deering
*	Director	December 21, 2015
Donald W. Dick, Jr.
*	Director	December 21, 2015
Bruce W. Duncan
*	Director	December 21, 2015
Robert J. Gerrard, Jr.
*	Director	December 21, 2015
Karen N. Horn
*	Director	December 21, 2015
Paul F. McBride

Page 4

/s/Brian C. Rogers	Director	December 21, 2015
Brian C. Rogers
*	Director	December 21, 2015
Cecilia E. Rouse
*	Director	December 21, 2015
John G. Schreiber
*	Director	December 21, 2015
Mark. R. Tercek
*/s/David Oestreicher	Vice President and	December 21, 2015
David Oestreicher	Attorney-In-Fact

Page 5

T. ROWE PRICE BALANCED FUND, INC.

T. ROWE PRICE BLUE CHIP GROWTH FUND, INC.

T. ROWE PRICE CALIFORNIA TAX-FREE INCOME TRUST

T. ROWE PRICE CAPITAL APPRECIATION FUND

T. ROWE PRICE CAPITAL OPPORTUNITY FUND, INC.

T. ROWE PRICE CORPORATE INCOME FUND, INC.

T. ROWE PRICE CREDIT OPPORTUNITIES FUND, INC.

T. ROWE PRICE DIVERSIFIED MID-CAP GROWTH FUND, INC.

T. ROWE PRICE DIVERSIFIED SMALL-CAP GROWTH FUND, INC.

T. ROWE PRICE DIVIDEND GROWTH FUND, INC.

T. ROWE PRICE EQUITY INCOME FUND

T. ROWE PRICE EQUITY SERIES, INC.

T. ROWE PRICE FINANCIAL SERVICES FUND, INC.

T. ROWE PRICE FIXED INCOME SERIES, INC.

T. ROWE PRICE FLOATING RATE FUND, INC.

T. ROWE PRICE GLOBAL ALLOCATION FUND, INC.

T. ROWE PRICE GLOBAL MULTI-SECTOR BOND FUND, INC.

T. ROWE PRICE GLOBAL REAL ESTATE FUND, INC.

T. ROWE PRICE GLOBAL TECHNOLOGY FUND, INC.

T. ROWE PRICE GNMA FUND

T. ROWE PRICE GROWTH & INCOME FUND, INC.

T. ROWE PRICE GROWTH STOCK FUND, INC.

T. ROWE PRICE HEALTH SCIENCES FUND, INC.

T. ROWE PRICE HIGH YIELD FUND, INC.

T. ROWE PRICE INDEX TRUST, INC.

T. ROWE PRICE INFLATION FOCUSED BOND FUND, INC.

T. ROWE PRICE INFLATION PROTECTED BOND FUND, INC.

T. ROWE PRICE INSTITUTIONAL EQUITY FUNDS, INC.

T. ROWE PRICE INSTITUTIONAL INCOME FUNDS, INC.

T. ROWE PRICE INSTITUTIONAL INTERNATIONAL FUNDS, INC.

T. ROWE PRICE INTERMEDIATE TAX-FREE HIGH YIELD FUND, INC.

T. ROWE PRICE INTERNATIONAL FUNDS, INC.

T. ROWE PRICE INTERNATIONAL INDEX FUND, INC.

T. ROWE PRICE INTERNATIONAL SERIES, INC.

T. ROWE PRICE MEDIA & TELECOMMUNICATIONS FUND, INC.

T. ROWE PRICE MID-CAP GROWTH FUND, INC.

T. ROWE PRICE MID-CAP VALUE FUND, INC.

T. ROWE PRICE MULTI-SECTOR ACCOUNT PORTFOLIOS, INC.

T. ROWE PRICE NEW AMERICA GROWTH FUND
T. ROWE PRICE NEW ERA FUND, INC.

T. ROWE PRICE NEW HORIZONS FUND, INC.

T. ROWE PRICE NEW INCOME FUND, INC.

T. ROWE PRICE PERSONAL STRATEGY FUNDS, INC.

T. ROWE PRICE PRIME RESERVE FUND, INC.

T. ROWE PRICE REAL ASSETS FUND, INC.

T. ROWE PRICE REAL ESTATE FUND, INC.

T. ROWE PRICE RESERVE INVESTMENT FUNDS, INC.

T. ROWE PRICE RETIREMENT FUNDS, INC.

T. ROWE PRICE SCIENCE & TECHNOLOGY FUND, INC.

T. ROWE PRICE SHORT-TERM BOND FUND, INC.

Page 6

T. ROWE PRICE SMALL-CAP STOCK FUND, INC.

T. ROWE PRICE SMALL-CAP VALUE FUND, INC.

T. ROWE PRICE SPECTRUM FUND, INC.

T. ROWE PRICE STATE TAX-FREE INCOME TRUST

T. ROWE PRICE SUMMIT FUNDS, INC.

T. ROWE PRICE SUMMIT MUNICIPAL FUNDS, INC.

T. ROWE PRICE TAX-EFFICIENT FUNDS, INC.

T. ROWE PRICE TAX-EXEMPT MONEY FUND, INC.

T. ROWE PRICE TAX-FREE HIGH YIELD FUND, INC.

T. ROWE PRICE TAX-FREE INCOME FUND, INC.

T. ROWE PRICE TAX-FREE SHORT-INTERMEDIATE FUND, INC.

T. ROWE PRICE U.S. BOND ENHANCED INDEX FUND, INC.

T. ROWE PRICE U.S. LARGE-CAP CORE FUND, INC.

T. ROWE PRICE U.S. TREASURY FUNDS, INC.

T. ROWE PRICE VALUE FUND, INC.

POWER OF ATTORNEY

RESOLVED, that the Corporation does hereby constitute and authorize Edward C. Bernard, Margery K. Neale and David Oestreicher, and each of them individually, their true and lawful attorneys and agents to take any and all action and execute any and all instruments which said attorneys and agents may deem necessary or advisable to enable the Corporation/Trust to comply with the Securities Act of 1933, as amended, and the Investment Company Act of 1940, as amended, and any rules, regulations, orders or other requirements of the United States Securities and Exchange Commission thereunder, in connection with the registration under the Securities Act of 1933, as amended, of shares of the Corporation/Trust, to be offered by the Corporation/Trust, and the registration of the Corporation/Trust under the Investment Company Act of 1940, as amended, including specifically, but without limitation of the foregoing, power and authority to sign the name of the Corporation/Trust on its behalf, and to sign the names of each of such directors/trustees and officers on his behalf as such director/trustee or officer to any (i) Registration Statement on Form N-1A or N-14 of the Corporation/Trust filed with the Securities and Exchange Commission under the Securities Act of 1933, as amended; (ii) Registration Statement on Form N-1A or N-14 of the Corporation/Trust under the Investment Company Act of 1940, as amended; (iii) amendment or supplement (including, but not limited to, Post-Effective Amendments adding additional series or classes of the Corporation/Trust) to said Registration Statement; and (iv) instruments or documents filed or to be filed as a part of or in connection with such Registration Statement, including Articles Supplementary, Articles of Amendment, and other instruments with respect to the Articles of Incorporation or Master Trust Agreement of the Corporation/Trust.

IN WITNESS WHEREOF, the above named Corporations/Trusts have caused these presents to be signed and the same attested by its Secretary, each thereunto duly authorized by its Board of Directors/Trustees, and each of the undersigned has hereunto set his hand and seal as of the day set opposite his name.

Page 7

ALL CORPORATIONS/TRUSTS /s/Edward C. Bernard
Edward C. Bernard /s/Catherine D. Mathews	Chairman of the Board (Principal Executive Officer) Director/Trustee	August 1, 2015
Catherine D. Mathews /s/William R. Brody	Treasurer (Principal Financial Officer)	August 1, 2015
William R. Brody /s/Anthony W. Deering	Director/Trustee	August 1, 2015
Anthony W. Deering /s/Donald W. Dick, Jr.	Director/Trustee	August 1, 2015
Donald W. Dick, Jr. /s/Bruce W. Duncan	Director/Trustee	August 1, 2015
Bruce W. Duncan /s/Robert J. Gerrard, Jr.	Director/Trustee	August 1, 2015
Robert J. Gerrard, Jr. /s/Karen N. Horn	Director/Trustee	August 1, 2015
Karen N. Horn	Director/Trustee	August 1, 2015

(Signatures Continued)

Page 8

ALL CORPORATIONS/TRUSTS /s/Paul F. McBride
Paul F. McBride /s/Cecilia E. Rouse	Director/Trustee	August 1, 2015
Cecilia E. Rouse /s/John G. Schreiber	Director/Trustee	August 1, 2015
John G. Schreiber /s/Mark R. Tercek	Director/Trustee	August 1, 2015
Mark R. Tercek	Director/Trustee	August 1, 2015

(Signatures Continued)

Page 9

BRIAN C. ROGERS, Director/Trustee

T. ROWE PRICE BALANCED FUND, INC.

T. ROWE PRICE BLUE CHIP GROWTH FUND, INC.

T. ROWE PRICE CAPITAL APPRECIATION FUND

T. ROWE PRICE CAPITAL OPPORTUNITY FUND, INC.

T. ROWE PRICE DIVERSIFIED MID-CAP GROWTH FUND, INC.

T. ROWE PRICE DIVERSIFIED SMALL-CAP GROWTH FUND, INC.

T. ROWE PRICE DIVIDEND GROWTH FUND, INC.

T. ROWE PRICE EQUITY INCOME FUND

T. ROWE PRICE EQUITY SERIES, INC.

T. ROWE PRICE FINANCIAL SERVICES FUND, INC.

T. ROWE PRICE GLOBAL ALLOCATION FUND, INC.

T. ROWE PRICE GLOBAL REAL ESTATE FUND, INC.

T. ROWE PRICE GLOBAL TECHNOLOGY FUND, INC.

T. ROWE PRICE GROWTH & INCOME FUND, INC.

T. ROWE PRICE GROWTH STOCK FUND, INC.

T. ROWE PRICE HEALTH SCIENCES FUND, INC.

T. ROWE INDEX TRUST, INC.

T. ROWE PRICE INSTITUTIONAL EQUITY FUNDS, INC.

T. ROWE PRICE INSTITUTIONAL INTERNATIONAL FUNDS, INC.

T. ROWE PRICE INTERNATIONAL FUNDS, INC.

T. ROWE PRICE INTERNATIONAL INDEX FUND, INC.

T. ROWE PRICE INTERNATIONAL SERIES, INC.

T. ROWE PRICE MEDIA & TELECOMMUNICATIONS FUND, INC.

T. ROWE PRICE MID-CAP GROWTH FUND, INC.

T. ROWE PRICE MID-CAP VALUE FUND, INC.

T. ROWE PRICE NEW AMERICA GROWTH FUND

T. ROWE PRICE NEW ERA FUND, INC.

T. ROWE PRICE NEW HORIZONS FUND, INC.

T. ROWE PRICE PERSONAL STRATEGY FUNDS, INC.

T. ROWE PRICE REAL ASSETS FUND, INC.

T. ROWE PRICE REAL ESTATE FUND, INC.

T. ROWE PRICE RETIREMENT FUNDS, INC.

T. ROWE PRICE SCIENCE & TECHNOLOGY FUND, INC.

T. ROWE PRICE SMALL-CAP STOCK FUND, INC.

T. ROWE PRICE SMALL-CAP VALUE FUND, INC.

T. ROWE PRICE SPECTRUM FUND, INC.

T. ROWE PRICE TAX-EFFICIENT FUNDS, INC.

T. ROWE PRICE U.S. LARGE-CAP CORE FUND, INC.

T. ROWE PRICE VALUE FUND, INC.

/s/Brian C. Rogers

Brian C. Rogers August 1, 2015

(Signatures Continued)

Page 10

EDWARD A. WIESE, Director/Trustee

T. ROWE PRICE CALIFORNIA TAX-FREE INCOME TRUST

T. ROWE PRICE CORPORATE INCOME FUND, INC.

T. ROWE PRICE CREDIT OPPORTUNITIES FUND, INC.

T. ROWE PRICE FIXED INCOME SERIES, INC.

T. ROWE PRICE FLOATING RATE FUND, INC.

T. ROWE PRICE GLOBAL MULTI-SECTOR BOND FUND, INC.

T. ROWE PRICE GNMA FUND

T. ROWE PRICE HIGH YIELD FUND, INC.

T. ROWE PRICE INSTITUTIONAL INCOME FUNDS, INC.

T. ROWE PRICE INFLATION FOCUSED BOND FUND, INC.

T. ROWE PRICE INFLATION PROTECTED BOND FUND, INC.

T. ROWE PRICE INTERMEDIATE TAX-FREE HIGH YIELD FUND, INC.

T. ROWE PRICE MULTI-SECTOR ACCOUNT PORTFOLIOS, INC.

T. ROWE PRICE NEW INCOME FUND, INC.

T. ROWE PRICE PRIME RESERVE FUND, INC.

T. ROWE PRICE RESERVE INVESTMENT FUNDS, INC.

T. ROWE PRICE SHORT-TERM BOND FUND, INC.

T. ROWE PRICE STATE TAX-FREE INCOME TRUST

T. ROWE PRICE SUMMIT FUNDS, INC.

T. ROWE PRICE SUMMIT MUNICIPAL FUNDS, INC.

T. ROWE PRICE TAX-EXEMPT MONEY FUND, INC.

T. ROWE PRICE TAX-FREE HIGH YIELD FUND, INC.

T. ROWE PRICE TAX-FREE INCOME FUND, INC.

T. ROWE PRICE TAX-FREE SHORT-INTERMEDIATE FUND, INC.

T. ROWE PRICE U.S. BOND ENHANCED INDEX FUND, INC.

T. ROWE PRICE U.S. TREASURY FUNDS, INC.

/s/Edward A. Wiese

Edward A. Wiese August 1, 2015

(Signatures Continued)

Page 11

ATTEST:

/s/Patricia B. Lippert

Patricia B. Lippert, Secretary

XML

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Document Type	dei_DocumentType	485BPOS
Document Period End Date	dei_DocumentPeriodEndDate	Dec. 31, 2014
Registrant Name	dei_EntityRegistrantName	T. Rowe Price Blue Chip Growth Fund, Inc.
Central Index Key	dei_EntityCentralIndexKey	0000902259
Amendment Flag	dei_AmendmentFlag	false
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T. Rowe Price Blue Chip Growth Fund, Inc.

T. Rowe Price

Blue Chip Growth Fund—I Class

SUMMARY

Investment Objective

The fund seeks to provide long-term capital growth.

Income is a secondary objective.

Fees and Expenses

This table describes the fees and expenses that you may pay if you buy and hold shares of the fund.

Fees and Expenses of the Fund’s I Class

Annual fund operating expenses
(expenses that you pay each year as a
percentage of the value of your investment)

Annual Fund Operating Expenses	T. Rowe Price Blue Chip Growth Fund, Inc. T. Rowe Price Blue Chip Growth Fund-I Class
Management fees	0.57%
Distribution and service (12b-1) fees	none
Other expenses	0.01%
Total annual fund operating expenses	0.58%

Example

This example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the fund for the time periods indicated and then redeem all of your shares at the end of those periods. The example also assumes that your investment has a 5% return each year and that the fund’s operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example	1 year	3 years	5 years	10 years
T. Rowe Price Blue Chip Growth Fund, Inc. | T. Rowe Price Blue Chip Growth Fund-I Class | USD ($)	59	186	324	726

Portfolio Turnover

The fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the fund’s performance. During the most recent fiscal year, the fund’s portfolio turnover rate (for existing classes) was 32.5% of the average value of its portfolio.

Investments, Risks, and Performance

Principal Investment Strategies

The fund will normally invest at least 80% of its net assets (including any borrowings for investment purposes) in the common stocks of large- and medium-sized blue chip growth companies. These are firms that, in our view, are well established in their industries and have the potential for above-average earnings growth. We focus on companies with leading market positions, seasoned management, and strong financial fundamentals. The fund’s investment approach reflects our belief that solid company fundamentals (with an emphasis on the potential for strong growth in earnings per share or operating cash flow) combined with a positive outlook for a company’s industry will ultimately reward investors with strong investment performance. Some of the companies we target for the fund should have good prospects for dividend growth, and the fund may at times invest significantly in stocks of technology companies.

In pursuing its investment objective, the fund has the discretion to deviate from its normal investment criteria. These situations might arise when the fund’s management believes a security could increase in value for a variety of reasons, including an extraordinary corporate event, a new product introduction or innovation, a favorable competitive development, or a change in management.

While most assets will typically be invested in U.S. common stocks, the fund may invest in foreign stocks in keeping with the fund’s objectives.

The fund may sell securities for a variety of reasons, such as to secure gains, limit losses, or redeploy assets into more promising opportunities.

Principal Risks

As with any mutual fund, there is no guarantee that the fund will achieve its objective. The fund’s share price fluctuates, which means you could lose money by investing in the fund. The principal risks of investing in this fund are summarized as follows:

Active management risk The fund is subject to the risk that the investment adviser’s judgments about the attractiveness, value, or potential appreciation of the fund’s investments may prove to be incorrect. If the investments selected and strategies employed by the fund fail to produce the intended results, the fund could underperform other funds with similar objectives and investment strategies.

Risks of stock investing Stocks generally fluctuate in value more than bonds and may decline significantly over short time periods. There is a chance that stock prices overall will decline because stock markets tend to move in cycles, with periods of rising and falling prices. The value of a stock in which the fund invests may decline due to general weakness in the stock market or because of factors that affect a particular company or industry.

Investment style risk Different investment styles tend to shift in and out of favor depending on market conditions and investor sentiment. The fund’s growth approach to investing could cause it to underperform other stock funds that employ a different investment style. Growth stocks tend to be more volatile than certain other types of stocks, and their prices may fluctuate more dramatically than the overall stock market. A stock with growth characteristics can have sharp price declines due to decreases in current or expected earnings and may lack dividends that can help cushion its share price in a declining market.

Market capitalization risk Although stocks issued by larger companies tend to have less overall volatility than stocks issued by smaller companies, larger companies may not be able to attain the high growth rates of successful smaller companies, especially during strong economic periods. In addition, larger companies may be less capable of responding quickly to competitive challenges and industry changes, and may suffer sharper price declines as a result of earnings disappointments.

Industry risk To the extent the fund invests in specific industries or sectors, it may be more susceptible to developments affecting those industries and sectors. For example, the fund may at times have significant investments in technology companies, which could result in the fund performing poorly during a downturn in one or more of the industries that heavily impact technology companies. Technology companies can be adversely affected by, among other things, intense competition, earnings disappointments, and rapid obsolescence of products and services due to technological innovations or changing consumer preferences.

Foreign investing risk This is the risk that the fund’s investments in foreign securities may be adversely affected by local, political, social, and economic conditions overseas, greater volatility, reduced liquidity, or decreases in foreign currency values relative to the U.S. dollar.

Performance

The Blue Chip Growth Fund—I Class has an inception date of December 17, 2015, and does not have a full calendar year of performance history. Performance for the class will be presented after the class has been in operation for one full calendar year. As a point of comparison, however, the following bar chart and table show calendar year returns and average annual total returns for the existing Investor Class of the Blue Chip Growth Fund (“Investor Class”). Because the Blue Chip Growth Fund—I Class is expected to have lower expenses than the Investor Class, its performance, had it existed over the periods shown, would have been higher. The Investor Class and the Blue Chip Growth Fund—I Class share the same portfolio. The bar chart and table provide some indication of the risks of investing in the fund by showing changes in the performance from year to year and how the Investor Class’ average annual returns for certain periods compare with the returns of a relevant broad-based market index, as well as with the returns of other comparative indexes that have investment characteristics similar to those of the fund.

The fund can also experience short-term performance swings, as shown by the best and worst calendar quarter returns during the years depicted for the Investor Class.

Performance information represents only past performance (before and after taxes) and does not necessarily indicate future results.

Blue Chip Growth Fund
Calendar Year Returns

	Quarter  Ended	Total Return
Best Quarter	3/31/12	18.76%
Worst Quarter	12/31/08	-24.91%

In addition, the average annual total returns table shows hypothetical after-tax returns to demonstrate how taxes paid by a shareholder may influence returns. After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns shown are not relevant to investors who hold their fund shares through tax-deferred arrangements, such as a 401(k) account or individual retirement account. In some cases, the figure shown for “returns after taxes on distributions and sale of fund shares” may be higher than the figure shown for “returns before taxes” because the calculations assume the investor received a tax deduction for any loss incurred on the sale of shares.

Average Annual Total Returns

Periods ended
December 31, 2014

Average Annual Total Returns - T. Rowe Price Blue Chip Growth Fund, Inc.	1 Year	5 Years	10 Years
T. Rowe Price Blue Chip Growth Fund, Inc.	9.28%	16.70%	8.81%
T. Rowe Price Blue Chip Growth Fund, Inc. | Returns after taxes on distributions	8.05%	16.42%	8.66%
T. Rowe Price Blue Chip Growth Fund, Inc. | Returns after taxes on distributions and sale of fund shares	6.23%	13.54%	7.23%
S&P 500 Index (reflects no deduction for fees, expenses, or taxes)	13.69%	15.45%	7.67%
Lipper Large-Cap Growth Funds Index	10.34%	14.12%	7.37%

Current performance information may be obtained through troweprice.com or by calling 1-800-638-8790.

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Element

Value

Risk/Return:

rr_RiskReturnAbstract

Registrant Name

dei_EntityRegistrantName

T. Rowe Price Blue Chip Growth Fund, Inc.

Prospectus Date

rr_ProspectusDate

Dec. 15, 2015

T. Rowe Price Blue Chip Growth Fund, Inc.

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

T. Rowe Price

Blue Chip Growth Fund—I Class

SUMMARY

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The fund seeks to provide long-term capital growth.

Objective, Secondary [Text Block]

rr_ObjectiveSecondaryTextBlock

Income is a secondary objective.

Expense [Heading]

rr_ExpenseHeading

Fees and Expenses

Expense Narrative [Text Block]

rr_ExpenseNarrativeTextBlock

This table describes the fees and expenses that you may pay if you buy and hold shares of the fund.

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

Fees and Expenses of the Fund’s I Class

Annual fund operating expenses
(expenses that you pay each year as a
percentage of the value of your investment)

Portfolio Turnover [Heading]

rr_PortfolioTurnoverHeading

Portfolio Turnover

Portfolio Turnover [Text Block]

rr_PortfolioTurnoverTextBlock

The fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the fund’s performance. During the most recent fiscal year, the fund’s portfolio turnover rate (for existing classes) was 32.5% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

32.50%

Expense Example [Heading]

rr_ExpenseExampleHeading

Example

Expense Example Narrative [Text Block]

rr_ExpenseExampleNarrativeTextBlock

This example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the fund for the time periods indicated and then redeem all of your shares at the end of those periods. The example also assumes that your investment has a 5% return each year and that the fund’s operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Strategy [Heading]

rr_StrategyHeading

Investments, Risks, and Performance

Principal Investment Strategies

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

The fund will normally invest at least 80% of its net assets (including any borrowings for investment purposes) in the common stocks of large- and medium-sized blue chip growth companies. These are firms that, in our view, are well established in their industries and have the potential for above-average earnings growth. We focus on companies with leading market positions, seasoned management, and strong financial fundamentals. The fund’s investment approach reflects our belief that solid company fundamentals (with an emphasis on the potential for strong growth in earnings per share or operating cash flow) combined with a positive outlook for a company’s industry will ultimately reward investors with strong investment performance. Some of the companies we target for the fund should have good prospects for dividend growth, and the fund may at times invest significantly in stocks of technology companies.

In pursuing its investment objective, the fund has the discretion to deviate from its normal investment criteria. These situations might arise when the fund’s management believes a security could increase in value for a variety of reasons, including an extraordinary corporate event, a new product introduction or innovation, a favorable competitive development, or a change in management.

While most assets will typically be invested in U.S. common stocks, the fund may invest in foreign stocks in keeping with the fund’s objectives.

The fund may sell securities for a variety of reasons, such as to secure gains, limit losses, or redeploy assets into more promising opportunities.

Risk [Heading]

rr_RiskHeading

Principal Risks

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

As with any mutual fund, there is no guarantee that the fund will achieve its objective. The fund’s share price fluctuates, which means you could lose money by investing in the fund. The principal risks of investing in this fund are summarized as follows:

Active management risk The fund is subject to the risk that the investment adviser’s judgments about the attractiveness, value, or potential appreciation of the fund’s investments may prove to be incorrect. If the investments selected and strategies employed by the fund fail to produce the intended results, the fund could underperform other funds with similar objectives and investment strategies.

Risks of stock investing Stocks generally fluctuate in value more than bonds and may decline significantly over short time periods. There is a chance that stock prices overall will decline because stock markets tend to move in cycles, with periods of rising and falling prices. The value of a stock in which the fund invests may decline due to general weakness in the stock market or because of factors that affect a particular company or industry.

Investment style risk Different investment styles tend to shift in and out of favor depending on market conditions and investor sentiment. The fund’s growth approach to investing could cause it to underperform other stock funds that employ a different investment style. Growth stocks tend to be more volatile than certain other types of stocks, and their prices may fluctuate more dramatically than the overall stock market. A stock with growth characteristics can have sharp price declines due to decreases in current or expected earnings and may lack dividends that can help cushion its share price in a declining market.

Market capitalization risk Although stocks issued by larger companies tend to have less overall volatility than stocks issued by smaller companies, larger companies may not be able to attain the high growth rates of successful smaller companies, especially during strong economic periods. In addition, larger companies may be less capable of responding quickly to competitive challenges and industry changes, and may suffer sharper price declines as a result of earnings disappointments.

Industry risk To the extent the fund invests in specific industries or sectors, it may be more susceptible to developments affecting those industries and sectors. For example, the fund may at times have significant investments in technology companies, which could result in the fund performing poorly during a downturn in one or more of the industries that heavily impact technology companies. Technology companies can be adversely affected by, among other things, intense competition, earnings disappointments, and rapid obsolescence of products and services due to technological innovations or changing consumer preferences.

Foreign investing risk This is the risk that the fund’s investments in foreign securities may be adversely affected by local, political, social, and economic conditions overseas, greater volatility, reduced liquidity, or decreases in foreign currency values relative to the U.S. dollar.

Risk Lose Money [Text]

rr_RiskLoseMoney

The fund’s share price fluctuates, which means you could lose money by investing in the fund.

Bar Chart and Performance Table [Heading]

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Performance

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

The Blue Chip Growth Fund—I Class has an inception date of December 17, 2015, and does not have a full calendar year of performance history. Performance for the class will be presented after the class has been in operation for one full calendar year. As a point of comparison, however, the following bar chart and table show calendar year returns and average annual total returns for the existing Investor Class of the Blue Chip Growth Fund (“Investor Class”). Because the Blue Chip Growth Fund—I Class is expected to have lower expenses than the Investor Class, its performance, had it existed over the periods shown, would have been higher. The Investor Class and the Blue Chip Growth Fund—I Class share the same portfolio. The bar chart and table provide some indication of the risks of investing in the fund by showing changes in the performance from year to year and how the Investor Class’ average annual returns for certain periods compare with the returns of a relevant broad-based market index, as well as with the returns of other comparative indexes that have investment characteristics similar to those of the fund.

The fund can also experience short-term performance swings, as shown by the best and worst calendar quarter returns during the years depicted for the Investor Class.

Performance information represents only past performance (before and after taxes) and does not necessarily indicate future results.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

The bar chart and table provide some indication of the risks of investing in the fund by showing changes in the performance from year to year and how the Investor Class’ average annual returns for certain periods compare with the returns of a relevant broad-based market index, as well as with the returns of other comparative indexes that have investment characteristics similar to those of the fund.

Performance One Year or Less [Text]

rr_PerformanceOneYearOrLess

The Blue Chip Growth Fund—I Class has an inception date of December 17, 2015, and does not have a full calendar year of performance history. Performance for the class will be presented after the class has been in operation for one full calendar year.

Performance Availability Phone [Text]

rr_PerformanceAvailabilityPhone

1-800-638-8790

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

troweprice.com

Performance Past Does Not Indicate Future [Text]

rr_PerformancePastDoesNotIndicateFuture

Performance information represents only past performance (before and after taxes) and does not necessarily indicate future results.

Bar Chart [Heading]

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Blue Chip Growth Fund
Calendar Year Returns

Bar Chart Closing [Text Block]

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	Quarter  Ended	Total Return
Best Quarter	3/31/12	18.76%
Worst Quarter	12/31/08	-24.91%

Bar Chart, Returns for Class Not Offered in Prospectus [Text]

rr_BarChartReturnsForClassNotOfferedInProspectus

As a point of comparison, however, the following bar chart and table show calendar year returns and average annual total returns for the existing Investor Class of the Blue Chip Growth Fund (“Investor Class”).

Performance Table Heading

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Average Annual Total Returns

Periods ended
December 31, 2014

Performance Table Uses Highest Federal Rate

rr_PerformanceTableUsesHighestFederalRate

After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes.

Performance Table Not Relevant to Tax Deferred

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Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns shown are not relevant to investors who hold their fund shares through tax-deferred arrangements, such as a 401(k) account or individual retirement account.

Performance Table Explanation after Tax Higher

rr_PerformanceTableExplanationAfterTaxHigher

In some cases, the figure shown for “returns after taxes on distributions and sale of fund shares” may be higher than the figure shown for “returns before taxes” because the calculations assume the investor received a tax deduction for any loss incurred on the sale of shares.

Performance Table Narrative

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In addition, the average annual total returns table shows hypothetical after-tax returns to demonstrate how taxes paid by a shareholder may influence returns. After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns shown are not relevant to investors who hold their fund shares through tax-deferred arrangements, such as a 401(k) account or individual retirement account. In some cases, the figure shown for “returns after taxes on distributions and sale of fund shares” may be higher than the figure shown for “returns before taxes” because the calculations assume the investor received a tax deduction for any loss incurred on the sale of shares.

Performance Table Closing [Text Block]

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Current performance information may be obtained through troweprice.com or by calling 1-800-638-8790.

T. Rowe Price Blue Chip Growth Fund, Inc. | T. Rowe Price Blue Chip Growth Fund-I Class

Risk/Return:

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Management fees

rr_ManagementFeesOverAssets

0.57%

Distribution and service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

none

Other expenses

rr_OtherExpensesOverAssets

0.01%

Total annual fund operating expenses

rr_ExpensesOverAssets

0.58%

1 year

rr_ExpenseExampleYear01

$ 59

3 years

rr_ExpenseExampleYear03

186

5 years

rr_ExpenseExampleYear05

324

10 years

rr_ExpenseExampleYear10

$ 726

T. Rowe Price Blue Chip Growth Fund, Inc. | T. Rowe Price Blue Chip Growth Fund, Inc.

Risk/Return:

rr_RiskReturnAbstract

2005

rr_AnnualReturn2005

5.95%

2006

rr_AnnualReturn2006

9.73%

2007

rr_AnnualReturn2007

13.02%

2008

rr_AnnualReturn2008

(42.62%)

2009

rr_AnnualReturn2009

42.57%

2010

rr_AnnualReturn2010

16.42%

2011

rr_AnnualReturn2011

1.50%

2012

rr_AnnualReturn2012

18.41%

2013

rr_AnnualReturn2013

41.57%

2014

rr_AnnualReturn2014

9.28%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best Quarter

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Mar. 31, 2012

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

18.76%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst Quarter

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2008

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(24.91%)

1 Year

rr_AverageAnnualReturnYear01

9.28%

5 Years

rr_AverageAnnualReturnYear05

16.70%

10 Years

rr_AverageAnnualReturnYear10

8.81%

T. Rowe Price Blue Chip Growth Fund, Inc. | Returns after taxes on distributions | T. Rowe Price Blue Chip Growth Fund, Inc.

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

8.05%

5 Years

rr_AverageAnnualReturnYear05

16.42%

10 Years

rr_AverageAnnualReturnYear10

8.66%

T. Rowe Price Blue Chip Growth Fund, Inc. | Returns after taxes on distributions and sale of fund shares | T. Rowe Price Blue Chip Growth Fund, Inc.

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

6.23%

5 Years

rr_AverageAnnualReturnYear05

13.54%

10 Years

rr_AverageAnnualReturnYear10

7.23%

T. Rowe Price Blue Chip Growth Fund, Inc. | S&P 500 Index (reflects no deduction for fees, expenses, or taxes)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

13.69%

5 Years

rr_AverageAnnualReturnYear05

15.45%

10 Years

rr_AverageAnnualReturnYear10

7.67%

T. Rowe Price Blue Chip Growth Fund, Inc. | Lipper Large-Cap Growth Funds Index

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

10.34%

5 Years

rr_AverageAnnualReturnYear05

14.12%

10 Years

rr_AverageAnnualReturnYear10

7.37%

XML

Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
Registrant Name	dei_EntityRegistrantName	T. Rowe Price Blue Chip Growth Fund, Inc.
Prospectus Date	rr_ProspectusDate	Dec. 15, 2015
Document Creation Date	dei_DocumentCreationDate	Dec. 09, 2015