UNITED STATES SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 11-K

þ Annual Report Pursuant to Section 15(d) of the Securities Exchange Act of 1934 (Fee Required)

For the Fiscal Year Ended December 31, 2010

OR

o Transition Report Pursuant to Section 15(d) of the Securities Exchange Act of 1934 (No Fee Required)

For the Transition Period from                      to                     

Commission File Number: 1-7959

STARWOOD HOTELS & RESORTS WORLDWIDE, INC.
SAVINGS AND RETIREMENT PLAN

(Full title of the plan)

Starwood Hotels & Resorts Worldwide, Inc.
1111 Westchester Avenue
White Plains, NY 10604

(Name of issuer of the securities held pursuant to the plan
and the address of its principal executive office)

STARWOOD HOTELS & RESORTS WORLDWIDE, INC.
SAVINGS AND RETIREMENT PLAN

FINANCIAL STATEMENTS AND
SUPPLEMENTAL SCHEDULE

December 31, 2010 and 2009

INDEX

	Pages
REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM	2
FINANCIAL STATEMENTS
Statements of Net Assets Available for Benefits	3
Statement of Changes in Net Assets Available for Benefits	4
Notes to Financial Statements	5 - 11
SUPPLEMENTAL SCHEDULE
Schedule H, Line 4(i) — Schedule of Assets (Held at End of Year)	12
SIGNATURE	13
EXHIBIT INDEX	14
EX-23.1

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To: STARWOOD HOTELS & RESORTS WORLDWIDE, INC. SAVINGS AND RETIREMENT PLAN

We have audited the accompanying statements of net assets available for benefits of Starwood Hotels & Resorts Worldwide, Inc. Savings and Retirement Plan (the “Plan”) as of December 31, 2010 and 2009, and the related statement of changes in net assets available for benefits for the year ended December 31, 2010. These financial statements are the responsibility of the Plan’s management. Our responsibility is to express an opinion on these financial statements based on our audits.

We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements. An audit also includes assessing the accounting principles used and significant estimates made by management, as well as evaluating the overall financial statement presentation. We believe that our audits provide a reasonable basis for our opinion.

In our opinion, the financial statements referred to above present fairly, in all material respects, the net assets available for benefits of the Plan as of December 31, 2010 and 2009, and the changes in net assets available for benefits for the year ended December 31, 2010 in conformity with U.S. generally accepted accounting principles.

Our audits were performed for the purpose of forming an opinion on the basic financial statements taken as a whole. The supplemental schedule listed in the accompanying index is presented for the purpose of additional analysis and is not a required part of the basic financial statements but is supplementary information required by the Department of Labor’s Rules and Regulations for Reporting and Disclosure under the Employee Retirement Income Security Act of 1974. This supplemental schedule is the responsibility of the Plan’s management. The supplemental schedule has been subjected to the auditing procedures applied in the audits of the basic financial statements and, in our opinion, is fairly stated in all material respects in relation to the basic financial statements taken as a whole.

/s/ Mayer Hoffman McCann P.C.

Phoenix, Arizona
June 24, 2011

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STARWOOD HOTELS & RESORTS WORLDWIDE, INC.
SAVINGS AND RETIREMENT PLAN

STATEMENTS OF NET ASSETS AVAILABLE FOR BENEFITS

December 31, 2010 and 2009

	2010		2009
Assets:
lnvestments at fair value	$	763,275,556	$	647,198,037
Receivables:
Participant contributions		1,131,338		1,143,253
Employer contributions		1,862,949		1,927,901
Notes receivable from participants		35,579,059		32,545,450
Other receivables		—		158,564
Accrued investment income		84		321,444
Total receivables		38,573,430		36,096,612
Total assets		801,848,986		683,294,649
Liabilities:
Accrued expenses		74,052		57,148
Total liabilities		74,052		57,148
Net assets available for benefits	$	801,774,934	$	683,237,501

See Notes to Financial Statements

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STARWOOD HOTELS & RESORTS WORLDWIDE, INC.
SAVINGS AND RETIREMENT PLAN

STATEMENT OF CHANGES IN NET ASSETS AVAILABLE FOR BENEFITS

Year Ended December 31, 2010

Additions to net assets attributed to:
Investment income:
Net appreciation in fair value of investments	$	88,920,449
Dividends and interest		9,863,933
Total investment income		98,784,382
Interest income on notes receivable from participants		1,754,916
Contributions:
Participants		64,839,616
Participant rollovers		2,032,335
Employer		30,448,461
Total contributions		97,320,412
Total additions		197,859,710
Deductions from net assets attributed to:
Benefits paid to participants		75,593,068
Investment and administrative expenses		4,120,539
Total deductions		79,713,607
Net increase in net assets before plan asset transfers		118,146,103
Assets transferred from other plans, net		391,330
Increase in net assets		118,537,433
Net assets available for benefits, beginning of year		683,237,501
Net assets available for benefits, end of year	$	801,774,934

See Notes to Financial Statements

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STARWOOD HOTELS & RESORTS WORLDWIDE, INC.
SAVINGS AND RETIREMENT PLAN

NOTES TO FINANCIAL STATEMENTS

December 31, 2010 and 2009

(1)	Description of the Plan
	The following description of the Starwood Hotels & Resorts Worldwide, Inc. Savings and Retirement Plan (the “Plan”) provides only general information. Participants should refer to the Plan document for a more complete description of the Plan’s provisions.
	Starwood Hotels & Resorts Worldwide, Inc. (“Starwood” or the “Company”) sponsors the Plan administered by the Starwood Global Benefits Committee (the “Plan Administrator”). The Plan was originally established effective April 1, 1997.
	General
	The Plan is a defined contribution plan that qualifies under Section 401(a) of the Internal Revenue Code (“IRC”), subject to the provisions of the Employee Retirement Income Security Act of 1974 (“ERISA”). The Plan provides for employee pretax and matching employer contributions in accordance with Section 401(k) and 401(m) of the IRC. The Plan’s assets are held in trust (“Trust”) pursuant to a trust agreement with the Company and State Street Bank and Trust Company (“State Street”).
	Eligibility
	Company employees become eligible to participate in the Plan when they are 21 years of age and have completed a three-month period of service. The Company does not begin to match contributions until the participant has completed one year of service as defined by the Plan.
	Contributions
	Plan participants may elect to make pretax contributions as a percentage of compensation up to 50% of compensation on a pre-tax basis, subject to the Internal Revenue Service limitation of $16,500 per year. The Company makes a matching contribution in an amount equal to 100% of the initial pretax contributions up to 1% of eligible compensation and 50% of the pretax contributions between 2% and 7% of the participant’s eligible compensation. Participants direct the investment of their contributions and the Company’s matching contribution into various investment options offered by the Plan.
	Participants who are age 50 or older by the end of the applicable Plan year and have contributed the maximum pretax contributions allowable by the Plan during the Plan year may make an additional pretax catch-up contribution. The catch-up contribution is subject to the Internal Revenue Service limitation of $5,500 per year.
	Vesting
	Participants are immediately vested in their voluntary contributions and earnings thereon. Participants become 100% vested in the Company’s contributions and earnings thereon after two years of service.
	Rollover contributions and distributions
	Participants entering the Plan may roll over contributions from a trust, individual retirement account (“IRA”) or individual retirement annuity qualified under the IRC no later than the 60th day following the day on which the individual receives the distribution. Participants leaving the Plan may request rollover distributions to the qualified plan of another employer, an IRA account or to an insurance company IRA annuity. The Plan automatically does a rollover distribution to a qualified IRA for account balances between $1,000 and $5,000 if a participant does not take a distribution or rollover to another account.

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STARWOOD HOTELS & RESORTS WORLDWIDE, INC.
SAVINGS AND RETIREMENT PLAN

NOTES TO FINANCIAL STATEMENTS

December 31, 2010 and 2009

(1)	Description of the Plan (continued)
	Participants’ accounts
	Separate accounts are maintained with respect to Plan participants’ pretax contributions, employer matching contributions, and rollover contributions. Each participant’s account is credited with the appropriate contributions and allowance of investment earnings and losses and charged with Plan investment expenses. Allocations of Plan earnings/losses and expenses are based on the proportion of each participant’s account balance to the total of all account balances for each investment type.
	Notes receivable from participants
	Participants may borrow from the vested portion of their accounts. The minimum loan amount is $1,000, restricted to 50% of the participant’s vested account balance. The maximum amount a participant may borrow is equal to the lesser of $50,000 or 50% of their vested account balance, reduced by any outstanding loan balance. A participant may have no more than two loans outstanding at one time. The repayment period may not exceed five years from the date of the loan, unless the loan proceeds are used to acquire the participant’s principal residence. The loans are collateralized by the balance in the participant’s account and bear interest at a fixed rate equal to the prime interest rate as of the first business day of the month when the loan was issued, plus 1%.
	Payment of benefits
	Participants are eligible for distribution of vested benefits upon retirement, death, disability or termination of employment. Participants may elect to receive a lump-sum amount or, subject to certain conditions, equal monthly or annual installments over a period not greater than 20 years. Participants may also elect to defer distributions subject to certain conditions.
	Withdrawals of a participant’s vested benefits are also permitted upon attainment of age 59-1/2 or, subject to Plan provisions, as a hardship distribution.
	Forfeitures
	Forfeitures of nonvested Company contributions are applied to reduce future Company contributions. Unallocated forfeited nonvested accounts totaled $35,534 and $210,207 at December 31, 2010 and 2009, respectively. During 2010, forfeited nonvested accounts reduced Company contributions by $586,538.
	Administrative expenses
	Administrative expenses, including investment management and recordkeeping fees, are paid from Plan assets, except to the extent the Company pays such expenses. For the year ended December 31, 2010, substantially all administrative expenses were paid by the Plan. Loan processing fees are deducted from the accounts of participants who have requested loans.
	Termination of the Plan
	Although it has not expressed any intent to do so, the Company has the right under the Plan agreement to suspend, reduce, or partially or completely discontinue its contributions at any time and to terminate the Plan, the trust agreement, and the trust thereunder, subject to the provisions of ERISA. In the event of Plan termination, partial termination or complete discontinuance of contributions, participants become fully vested in the Company contributions. Additionally, any forfeitures that have not been used to reduce Company contributions to the Plan as of the termination will be credited pro rata to the accounts of all participants in accordance with Plan provisions.

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STARWOOD HOTELS & RESORTS WORLDWIDE, INC.
SAVINGS AND RETIREMENT PLAN

NOTES TO FINANCIAL STATEMENTS

December 31, 2010 and 2009

(2)	Summary of Significant Accounting Policies
	Basis of presentation
	The Financial Accounting Standards Board (“FASB”) sets U.S. generally accepted accounting principles (“GAAP”) to ensure consistent reporting. References to GAAP issued by the FASB in the accompanying footnotes are to the FASB Accounting Standards Codification (“FASB ASC”).
	The accompanying financial statements have been prepared on the accrual basis of accounting. Accordingly, income is recognized when earned and expenses are recorded when incurred.
	Purchases and sales of securities are recorded on a trade-date basis. Interest income is recorded on the accrual basis. Dividends are recorded on the ex-dividend date.
	Use of estimates
	The preparation of financial statements in conformity with U.S. generally accepted accounting principles requires the Plan Administrator to make estimates and assumptions that affect the reported amount of assets, liabilities and net assets and the reported amount of additions to and deductions from net assets. Actual results could differ from those estimates.
	Concentration of credit risk and market risk
	The Plan provides for various investment fund options which in turn invest in any combination of stocks, bonds and other investment securities. Investment securities are exposed to various risks, such as interest rate, market and credit risks. The Plan’s risk of credit loss is limited to the carrying value of the investments. Due to the level of risk associated with certain investment securities, it is at least reasonably possible that changes in risks in the near term could materially affect participants’ account balances and the amounts reported in the statements of net assets available for benefits and the statement of changes in net assets available for benefits.
	Subsequent events
	Plan management has evaluated subsequent events through the date the Plan financial statements were available to be issued.
	Fair value measurements
	FASB ASC 820, Fair Value Measurements and Disclosures, establishes a common definition for fair value to be applied to U.S. generally accepted accounting principles requiring the use of fair value, establishes a framework for measuring fair value, and expands disclosures about such fair value measurements. It also establishes a hierarchy for ranking the quality and reliability of the information used to determine fair values by requiring that assets and liabilities carried at fair value be classified and disclosed in one of the following three categories:

Level 1	—	Quoted prices in active markets for identical assets or liabilities.
Level 2	—	Inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities.
Level 3	—	Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities.

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STARWOOD HOTELS & RESORTS WORLDWIDE, INC.
SAVINGS AND RETIREMENT PLAN

NOTES TO FINANCIAL STATEMENTS

December 31, 2010 and 2009

(2)	Summary of Significant Accounting Policies (continued)
	Fair value measurements (continued)
	The asset’s fair value measurement level within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement. Valuation techniques used should maximize the use of observable inputs and minimize the use of unobservable inputs.
	Following is a description of the valuation methodologies used for assets measured at fair value.
	Money Market Fund: Valued at cost, which approximates fair value.
	Collective Trusts: Valued by the trustee based on the fair value of the underlying securities within the fund.
	Mutual Funds: Valued using quoted market prices in active markets.
	Starwood Common Stock: Valued using quoted market prices in active markets.
	The methods described above may produce a fair value calculation that may not be indicative of net realizable value or reflective of future fair value. Furthermore, while the Plan believes its valuation methods are appropriate and consistent with other market participants, the use of different methodologies or assumptions to determine the fair value of certain financial instruments could result in different fair value measurement at the reporting date.
	Adopted accounting standards
	Notes receivable from participants are measured at their unpaid principal balance plus accrued interest. The Plan adopted Accounting Standards Update No. 2010-25, Reporting Loans to Participants by Defined Contribution Pension Plans, in its December 31, 2010 financial statements and accordingly has presented notes receivable from participants separately from investments. Net assets available for benefits were not affected by the adoption of this update.
	Benefits paid to participants
	Benefits paid to participants are recorded in the period in which they are paid.
	Assets transferred from other plans, net
	Assets transferred from or to other plans represent transfers of participant account balances whenever a participant changes employment between the Company and a nonaffiliate of Starwood who has elected to adopt the Starwood Hotels & Resorts Worldwide, Inc. Savings and Retirement Plan as a mirror plan.

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STARWOOD HOTELS & RESORTS WORLDWIDE, INC.
SAVINGS AND RETIREMENT PLAN

NOTES TO FINANCIAL STATEMENTS

December 31, 2010 and 2009

(3)	Fair Value Measurements
	The following table sets forth by level, within the fair value hierarchy, the Plan’s assets at fair value as of December 31, 2010:

	Level 1		Level 2		Level 3		Total
Money Market Fund	$	—	$	1,165,436	$	—	$	1,165,436
Collective Trusts		—		151,382,773		—		151,382,773
Mutual Funds
Short-term		166,356,017		—		—		166,356,017
Bond		72,546,618		—		—		72,546,618
Large-Cap Stocks		86,144,865		—		—		86,144,865
Large and Mid-Cap Stocks		75,643,628		—		—		75,643,628
Mid-Cap Stocks		26,604,872		—		—		26,604,872
Mid and Small-Cap Stocks		11,249,522		—		—		11,249,522
Foreign Stocks		85,820,439		—		—		85,820,439
Total Mutual Funds		524,365,961		—		—		524,365,961
Starwood Common Stock		86,361,386		—		—		86,361,386
Total Assets at Fair Value	$	610,727,347	$	152,548,209	$	—	$	763,275,556

The following table sets forth by level, within the fair value hierarchy, the Plan’s assets at fair value as of December 31, 2009:

	Level 1		Level 2		Level 3		Total
Money Market Fund	$	—	$	798,516	$	—	$	798,516
Collective Trusts		—		115,062,123		—		115,062,123
Mutual Funds
Short-term		172,321,717		—		—		172,321,717
Bond		59,319,211		—		—		59,319,211
Large-Cap Stocks		71,641,119		—		—		71,641,119
Large and Mid-Cap Stocks		67,185,980		—		—		67,185,980
Mid-Cap Stocks		20,022,088		—		—		20,022,088
Mid and Small-Cap Stocks		3,576,679		—		—		3,576,679
Foreign Stocks		78,629,936		—		—		78,629,936
Total Mutual Funds		472,696,730		—		—		472,696,730
Starwood Common Stock		58,640,668		—		—		58,640,668
Total Assets at Fair Value	$	531,337,398	$	115,860,639	$	—	$	647,198,037

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STARWOOD HOTELS & RESORTS WORLDWIDE, INC.
SAVINGS AND RETIREMENT PLAN

NOTES TO FINANCIAL STATEMENTS

December 31, 2010 and 2009

(4)	Investments
	The following investments, along with their respective percentage of net assets available for benefits, represent 5% or more of the Plan’s net assets available for benefits at December 31:

	2010				2009
Vanguard Prime Money Market Fund	$	166,356,017	21	%	$	172,321,717	25	%
Starwood Common Stock		86,361,386	11			58,640,668	9
Vanguard Institutional Index Fund		86,144,865	11			71,641,119	10
Fidelity Diversified International Fund		85,820,439	11			78,629,936	12
PIMCO Total Return Admin. Fund		72,546,618	9			59,319,211	9
Wells Fargo Advantage Capital Growth Fund		61,791,282	8			55,373,703	8
BlackRock LifePath 2040		48,516,678	6			*	*
BlackRock LifePath 2030		45,800,989	6			35,334,804	5

* Investment balance is less than 5% of the Plan’s net assets.

The Plan’s investments (including gains and losses on investments purchased and sold, as well as held during the year) appreciated in value as follows for the year ended December 31, 2010:

Collective Trusts	$	17,749,564
Mutual Funds		33,585,357
Starwood Common Stock		37,585,528
	$	88,920,449

(5)	Tax Status
	The Plan received a favorable determination letter from the IRS dated October 8, 2003. The determination letter was applicable for amendments adopted by the Plan through January 8, 2002. Subsequent to this determination by the IRS, the Plan was further amended. Effective January 1, 2006, the Plan was restated to adopt all prior amendments to the Plan. Subsequent to the Plan restatement, the Plan was further amended. Although the Plan has been amended and restated since receiving the determination letter, the Plan Administrator believes that the Plan is designed and operated in compliance with the applicable requirements of the IRC and that the Plan was qualified and the related trust was tax-exempt as of December 31, 2010.
(6)	Party-in-Interest Transactions
	Certain Plan investments are held in funds managed by State Street; therefore, these transactions qualify as party-in-interest transactions. In addition, certain Plan investments are in Starwood common stock, qualifying these transactions as party-in-interest transactions. Fees incurred by the Plan for the investment management services amounted to $372,072 for the year ended December 31, 2010. In addition, fees paid to the Plan’s recordkeeper amounted to $3,591,505 for the year ended December 31, 2010.

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STARWOOD HOTELS & RESORTS WORLDWIDE, INC.
SAVINGS AND RETIREMENT PLAN

NOTES TO FINANCIAL STATEMENTS

December 31, 2010 and 2009

(6)	Party-in-Interest Transactions (continued)
	The Company also charges the Trust for an allocation of certain administrative costs. The Company is the Trust sponsor; therefore, these transactions qualify as party-in-interest transactions. Total costs charged to the Trust were $156,962 for the year ended December 31, 2010.
(7)	Reconciliation of Financial Statements to Form 5500
	The following is a reconciliation of the net assets available for benefits from the financial statements to the Form 5500 at December 31,:

	2010			2009
Net assets available for benefits per financial statements	$	801,774,934		$	683,237,501
Amounts allocated to withdrawing participants		(538,426	)		(600,840	)
Net assets available for benefits per Form 5500	$	801,236,508		$	682,636,661

The following is a reconciliation of benefits paid to participants as reported in the financial statements for the year ended December 31, 2010 to Form 5500:

Benefits paid to participants per the financial statements	$	75,593,068
Amounts allocated to withdrawing participants at December 31, 2009		(600,840	)
Amounts allocated to withdrawing participants at December 31, 2010		538,426
Benefits paid to participants per the Form 5500	$	75,530,654

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STARWOOD HOTELS & RESORTS WORLDWIDE, INC.
SAVINGS AND RETIREMENT PLAN
EIN #52-1193298
Plan #001

Schedule H, Line 4(i) — Schedule of Assets (Held at End of Year)

December 31, 2010

	Description of investment
	including maturity date,
Identity of issuer, borrower,	rate of interest, collateral,
lessor, or similar party	par or maturity value	Current value
Money Market Fund
*   State Street Short Term Investment Fund	1,165,436 units	$	1,165,436
Collective Trusts
BlackRock LifePath Retirement	1,545,068 units		18,807,926
BlackRock LifePath 2020	3,117,862 units		36,017,431
BlackRock LifePath 2030	4,057,256 units		45,800,989
BlackRock LifePath 2040	4,360,014 units		48,516,678
BlackRock LifePath 2050	187,138 units		2,239,749
Total Collective Trusts			151,382,773
Mutual Funds
Vanguard Prime Money Market Fund	12,659,800 units		166,356,017
Vanguard Institutional Index Fund	1,848,176 units		86,144,865
PIMCO Total Return Admin. Fund	2,592,562 units		72,546,618
Dreyfus Premiere Structured Mid-Cap Fund	2,808,175 units		26,604,872
Veracity Small Cap Value Fund	1,062,850 units		11,249,522
John Hancock Classic Value Fund	2,037,437 units		13,852,346
Wells Fargo Advantage Capital Growth Fund	6,506,717 units		61,791,282
Fidelity Diversified International Fund	821,847 units		85,820,439
Total Mutual Funds			524,365,961
*   Starwood Common Stock	1,418,479 shares		86,361,386
Participant Loans	Secured by vested benefits; maturity dates through May 2022; interest rates 4.25% - 9.5%		35,579,059
Total Assets (held at end of year)		$	798,854,615

* Represents a party-in-interest

Note: Cost information has been excluded as all investments are participant-directed investments

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SIGNATURE

     Pursuant to the requirements of the Securities Exchange Act of 1934, the Starwood Hotels & Resorts Worldwide, Inc. Global Benefits Committee has duly caused this annual report to be signed on its behalf by the undersigned hereunto duly authorized.

STARWOOD HOTELS & RESORTS WORLDWIDE, INC. SAVINGS AND RETIREMENT PLAN
By:	/s/ Alan Schnaid
	Alan Schnaid
	Starwood Hotels & Resorts Worldwide, Inc. Global Benefits Committee Member

Date: June 24, 2011

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EXHIBIT INDEX

The following exhibits are filed as part of this Annual Report on Form 11-K:

Exhibit
Number	Description of Exhibit
23.1	Consent of Mayer Hoffman McCann P.C., Independent Registered Public Accounting Firm

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