MET INVESTORS SERIES    TRUST SUMMARY PROSPECTUS    April 30, 2012

SSgA Growth ETF Portfolio

Class A, Class B and Class E Shares

Before you invest, you may want to review the Portfolio’s Prospectus, which contains more information about the Portfolio and its risks. You can find the Portfolio’s Prospectus and other information about the Portfolio (including the documents listed below) online at www.metlife.com/variablefunds. You can also get this information at no cost by calling 1-800-638-7732 or by sending an e-mail request to RCG@metlife.com. The Portfolio’s Prospectus and Statement of Additional Information, both dated April 30, 2012, and the Portfolio’s financial statements for the year ended December 31, 2011, including the notes to the financial statements, the financial highlights and the report of the Portfolio’s independent registered public accounting firm, all of which are included in the Annual Report of the Portfolio, dated December 31, 2011, are all incorporated by reference into this Summary Prospectus. This Summary Prospectus is intended for individuals who have purchased certain variable life insurance policies and variable annuity contracts (collectively, “Contracts”) from Metropolitan Life Insurance Company and its affiliates and is not intended for use by other investors.

Investment Objective

Growth of capital.

Fees and Expenses of the Portfolio

The following table describes the fees and expenses that you may pay if you buy and hold shares of the Portfolio. These fees and expenses are for the year ended December 31, 2011, and are expressed as a percentage of the Portfolio’s average daily net assets over that period. The table and the Example below do not reflect the fees, expenses or withdrawal charges imposed by the Contracts but do reflect the fees and expenses of the investment companies known as exchange-traded funds in which the Portfolio invests (the “Underlying ETFs”). If Contract expenses were reflected, the fees and expenses in the table and Example would be higher. See the Contract prospectus for a description of those fees, expenses and charges.

Shareholder Fees (fees paid directly from your investment)—None

Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

	Class A	Class B	Class E
Management Fee	0.32%	0.32%	0.32%
Distribution and/or Service (12b-1) Fees	None	0.25%	0.15%
Other Expenses	0.03%	0.03%	0.03%
Acquired Fund Fees and Expenses (Expenses of Underlying ETFs and Other Investment Companies)	0.24%	0.24%	0.24%
Total Annual Portfolio Operating Expenses and Acquired Fund Fees and Expenses	0.59%	0.84%	0.74%

As an investor in an Underlying ETF, the Portfolio bears its pro-rata portion of the operating expenses of that Underlying ETF, including such Underlying ETF’s management fee. The percentage shown for Acquired Fund Fees and Expenses (Expenses of Underlying ETFs and Other Investment Companies) shows the fees and expenses that the Portfolio incurred indirectly as a result of its investments in shares of the relevant Underlying ETFs during the last fiscal year.

Example

The following Example is intended to help you compare the cost of investing in the Portfolio, including the cost of investing in the Underlying ETFs and other investment companies, with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the Portfolio 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, that you reinvest all of your dividends and that the Portfolio’s operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions, your costs would be:

	Class A	Class B	Class E
1 Year	$60	$86	$76
3 Years	$190	$269	$237
5 Years	$330	$468	$413
10 Years	$740	$1,040	$921

Portfolio Turnover

The Portfolio 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. These costs, which are not reflected in annual portfolio operating expenses or in the Example, affect the Portfolio’s performance. During the most recent fiscal year, the Portfolio’s portfolio turnover rate was 35.3% of the average value of its portfolio.

Principal Investment Strategies

SSgA Funds Management, Inc. (“SSgA FM”), subadviser to the Portfolio, invests, under normal circumstances, at least 80% of the

Portfolio’s net assets in Underlying ETFs. The Portfolio allocates its assets among various asset classes. SSgA FM establishes specific investment percentages for the asset classes and then selects the Underlying ETFs in which the Portfolio invests.

The Portfolio invests a significant portion of its assets in Underlying ETFs that invest primarily in the U.S. and international equity markets with moderate allocations to Underlying ETFs that invest primarily in fixed income securities considered to reduce portfolio volatility in difficult market environments. This model may be appropriate for investors with above-average risk tolerance.

In an effort to achieve its investment objective and reduce portfolio volatility over an intermediate-term cycle, equity investments are allocated across a range of asset classes, which can include, but are not limited to: large, mid and small cap, real estate investment trust (“REIT”), and foreign developed and emerging market securities. Allocations to fixed income asset classes may include inflation protected government (both U.S. and foreign), investment grade corporate and high-yield funds.

In addition, the Portfolio may invest in other asset classes (e.g., commodities) through exchange traded investment vehicles.

The following chart describes the strategic target allocations, as of April 30, 2012, among the range of equities, fixed income and cash/money market securities for the Portfolio. You should note that these percentages may not directly correspond to investment in the Underlying ETFs because each Underlying ETF may contain various subsets of an asset class (e.g., large cap and mid cap equity securities), and the percentages are subject to review and modification by SSgA FM.

In addition to investing in Underlying ETFs, the Portfolio may invest in other exchange traded vehicles such as exchange traded notes and exchange traded grantor trusts.

Asset Class		Target Allocation
Equities	80%
U.S. Large Cap		35%
U.S. Mid Cap		5%
U.S. Small Cap		5%
International Equity		20%
International Small Cap		3%
Emerging Market Equity		7%
Real Estate Investment Trusts		3%
International Real Estate Investment Trusts		2%
Fixed Income	18%
U.S. Fixed Income		10%
High Yield		5%
Treasury Inflation-Protected Securities		3%
Cash/Cash Equivalents	2%

Although the Portfolio will invest new assets and reinvest dividends based on the target allocations at such time, the Portfolio’s allocations could change substantially over time as the Underlying ETFs’ asset values change due to market movements and portfolio management decisions.

The Portfolio currently seeks to achieve capital growth through its investments in Underlying ETFs that invest primarily in equity securities of large U.S. and foreign companies.

The Portfolio currently seeks to reduce portfolio volatility through its investments in Underlying ETFs that invest primarily in domestic investment-grade fixed income securities.

Model allocations are reviewed by SSgA FM’s Asset Allocation group at least monthly and will be adjusted as the market and economic outlook changes. Generally, any changes among asset classes will be within a range of plus or minus 5 percentage points per asset class per quarter; however, SSgA FM may at times make larger allocation changes if it believes market conditions warrant a larger change. SSgA FM reserves the right to replace Underlying ETFs or other securities in its asset allocation model at any time, although such changes would generally be the result of a change in the asset allocation with respect to an asset class.

Although the Portfolio currently invests primarily in Underlying ETFs, it may also invest in other types of securities, including open-end investment companies such as high yield bond funds and cash equivalents such as money market funds or repurchase agreements. In addition, SSgA FM may choose to achieve a targeted allocation to cash by entering into repurchase agreements, directly purchasing money market instruments, or purchasing Underlying ETFs that invest in cash securities.

For additional information about the Portfolio’s investment strategies and the actual allocation percentages of the Portfolio’s investments in the Underlying ETFs as of the end of the prior quarter, please see “Additional Information About the Portfolio’s Investment Strategies” in this Prospectus.

Primary Risks

As with all mutual funds, there is no guarantee that the Portfolio will achieve its investment objective. You could lose money by investing in the Portfolio. An investment in the Portfolio through a Contract is not a deposit or obligation of, or guaranteed by, any bank, and is not federally insured by the Federal Deposit Insurance Corporation, the Federal Reserve Board, or any other agency of the U.S. Government.

There are direct and indirect risks of investing in the Portfolio. The value of your investment in the Portfolio may be affected by one or more of the following risks, which are described in more detail in “Primary Risks of Investing in the Portfolio” in the Prospectus, any of which could cause the Portfolio’s return, the price of the Portfolio’s shares or the Portfolio’s yield to fluctuate. Please note that there are many other circumstances that could adversely affect your investment and prevent the Portfolio from reaching its objective, which are not described here.

Direct risks of investing in the Portfolio include:

Performance Risk.    The investment performance of a Portfolio that invests all or substantially all of its assets in Underlying ETFs

SSgA Growth ETF Portfolio

2

may be adversely affected if the Underlying ETFs are unable to meet their investment objectives or the Portfolio allocates a significant portion of its assets to an Underlying ETF that performs poorly, including relative to other Underlying ETFs.

Asset Allocation Risk.    The Portfolio’s ability to achieve its investment objective depends upon SSgA FM’s analysis of various factors and SSgA FM’s ability to select the appropriate mix of asset classes based on its analysis of such factors, which may prove incorrect. The Portfolio may experience losses or poor relative performance if SSgA FM allocates a significant portion of the Portfolio’s assets to an asset class that does not perform as SSgA FM anticipated, including relative to other asset classes. The Portfolio may underperform funds that allocate their assets differently than the Portfolio.

Indirect risks of investing in the Portfolio (direct risks of investing in the Underlying ETFs) include:

Market Risk.    An Underlying ETF’s share price can fall because of, among other things, a decline in the market as a whole, deterioration in the prospects for a particular industry or company, or changes in general economic conditions, such as prevailing interest rates and investor sentiment. Significant disruptions to the financial markets could adversely affect the liquidity and volatility of securities held by an Underlying ETF.

Foreign Investment Risk.    Investments in foreign securities tend to be more volatile and less liquid than investments in U.S. securities because, among other things, they involve risks relating to political, social and economic developments abroad, as well as risks resulting from differences between the regulations and reporting standards and practices to which U.S. and foreign issuers are subject. To the extent foreign securities are denominated in foreign currencies, their values may be adversely affected by changes in currency exchange rates. All of the risks of investing in foreign securities are typically increased by investing in emerging market countries.

Market Capitalization Risk.    Investing primarily in issuers in one market capitalization category (large, medium or small) carries the risk that due to current market conditions that category may be out of favor with investors. Larger, more established companies may be unable to respond quickly to new competitive challenges or attain the high growth rate of successful smaller companies. Stocks of smaller companies may be more volatile than those of larger companies due to, among other things, narrower product lines, more limited financial resources and fewer experienced managers. In addition, there is typically less publicly available information about small capitalization companies, and their stocks may have a more limited trading market than stocks of larger companies.

Investment Style Risk.    Different investment styles such as growth or value tend to shift in and out of favor, depending on market and economic conditions as well as investor sentiment. An Underlying ETF may outperform or underperform other funds that employ a different investment style.

Credit and Counterparty Risk.    The value of an Underlying ETF’s investments may be adversely affected if a security’s credit rating is downgraded; an issuer of an investment held by an Underlying ETF fails to pay an obligation on a timely basis, otherwise defaults or is perceived by other investors to be less creditworthy; or a counterparty to a derivatives or other transaction with an Underlying ETF files for bankruptcy, becomes insolvent, or otherwise becomes unable or unwilling to honor its obligation to an Underlying ETF.

Interest Rate Risk.    The value of an Underlying ETF’s investments in fixed income securities may decline when prevailing interest rates rise or increase when interest rates go down. The longer a security’s maturity or duration, the greater its value will change in response to changes in interest rates. The interest earned on an Underlying ETF’s investments in fixed income securities may decline when prevailing interest rates decline.

High Yield Debt Security Risk.    High yield debt securities, or “junk” bonds, may be more susceptible to market risk and credit and counterparty risk than investment grade debt securities because issuers of high yield debt securities are less secure financially and their securities are more sensitive to downturns in the economy. In addition, the secondary market for high yield debt securities may not be as liquid as that for more highly rated debt securities.

Commodities Risk.    Exposure to the commodities markets may subject the Portfolio to greater volatility than investments in traditional securities. The value of commodities and commodity-linked derivative instruments may be affected by changes in overall market movements, commodity index volatility, changes in interest rates, or factors affecting a particular industry or commodity.

Portfolio Turnover Risk.    The investment techniques and strategies utilized by the Underlying ETFs might result in a high degree of portfolio turnover. High portfolio turnover rates will increase the Underlying ETFs’ transaction costs, which can adversely affect the returns on the Portfolio’s investments in those Underlying ETFs.

Past Performance

The information below shows the volatility of the Portfolio’s returns from year to year and how the Portfolio’s average annual returns over time compare with those of a broad-based securities market index. Both the bar chart and table assume reinvestment of dividends and distributions. Note that the results in the bar chart and table do not include the effect of Contract charges. If these Contract charges had been included, performance would have been lower. As with all mutual funds, past returns are not a prediction of future returns.

The bar chart below shows you the performance of the Portfolio’s Class B shares for each full calendar year since its inception and indicates how it has varied from year to year. The Portfolio can

SSgA Growth ETF Portfolio

3

also experience short-term performance swings as indicated in the high and low quarter information at the bottom of the chart. The table below compares the Portfolio’s average annual compounded total returns for each class with index returns. For more information about indexes, please see “Index Description” in the Prospectus. It is not possible to invest directly in an index. Effective September 2, 2008, SSgA FM became the subadviser. Investment performance prior to that date is attributable to the Portfolio’s former investment subadviser.

Year-by-Year Total Return as of December 31 of Each Year

Highest Quarter	2nd – 2009	18.61%
Lowest Quarter	4th – 2008	-17.39%

Average Annual Total Return as of December 31, 2011
	1 Year	5 Years	Since Inception	Inception Date
Class A	-1.87%	0.68%	1.84%	5-1-06
Class B	-2.13%	0.42%	2.77%	10-3-05
Class E	-1.99%	0.52%	1.69%	5-1-06
MSCI ACWI (All Country World Index) (reflects no deduction for mutual fund fees and expenses)	-7.35%	-1.93%	2.03%*
* Index performance is from 10-3-05.

Management

Adviser.    MetLife Advisers, LLC (“MetLife Advisers”) is the Portfolio’s investment adviser.

Subadviser.    SSgA Funds Management, Inc. (the “Subadviser”) is the subadviser to the Portfolio.

Portfolio Managers.    Daniel P. Farley, CFA, a Senior Managing Director of SSgA FM and the Chief Investment Officer for SSgA’s Multi-Asset Class Solutions (“MACS”) Team, Timothy J. Furbush, CFA, a Principal of SSgA FM and a Portfolio Manager in the MACS Team, and Christopher J. Goolgasian, CFA, CPA, CAIA, a Vice President of SSgA FM and a Senior Portfolio Manager in the MACS Team, have managed the Portfolio since 2008, 2010 and 2010, respectively.

Tax Information

For information regarding the tax consequences of Contract ownership, please see the prospectus for the relevant Contract.

Payments to Insurance Companies and Their Affiliates

The Portfolio is not sold directly to the general public but instead is offered as an underlying investment option for Contracts issued by insurance companies that are affiliated with the Portfolio and MetLife Advisers. As a result of these affiliations, the insurance companies may benefit more from offering the Portfolio as an investment option in the Contracts than offering other unaffiliated portfolios. The Portfolio and its related companies may also make payments to the sponsoring insurance companies (or their affiliates) for distribution and/or other services. The benefits to the insurance companies of offering the Portfolio over unaffiliated portfolios and these payments may be factors that the insurance companies consider in including the Portfolio as an underlying investment option in the Contracts and may create a conflict of interest. The prospectus for your Contract contains additional information about these payments.

SSgA Growth ETF Portfolio

4