Ownership Submission
FORM 4
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
Brown Cary D
   2. Issuer Name and Ticker or Trading Symbol
LEGACY RESERVES LP [LGCY] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
__X__ Director __X__ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
Chairman and CEO
(Last)
(First)
(Middle)
303 W. WALL STREET, SUITE 1400		 3. Date of Earliest Transaction (Month/Day/Year)
03/11/2010
(Street)

MIDLAND, TX 79701		 4. If Amendment, Date Original Filed(Month/Day/Year)
 6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)		 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code
(Instr. 8)		 4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)		 5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4)		 6. Ownership Form: Direct (D) or Indirect (I)
(Instr. 4)		 7. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V Amount (A) or (D) Price
Units representing limited partner interests 03/11/2010   M   20,000 A $ 17 974,265 D  
Units representing limited partner interests 03/11/2010   D(1)   20,000 D $ 22.99 954,265 D  
Units representing limited partner interests               4,425,080 I See footnotes (2) (3)

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 3)		 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code
(Instr. 8)		 5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4, and 5)		 6. Date Exercisable and Expiration Date
(Month/Day/Year)		 7. Title and Amount of Underlying Securities
(Instr. 3 and 4)		 8. Price of Derivative Security
(Instr. 5)		 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 4)		 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 4)		 11. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Unit Options (right to buy) $ 17 03/11/2010   M     20,000 03/15/2009 07/17/2011 Units 20,000 $ 0 0 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
Brown Cary D
303 W. WALL STREET, SUITE 1400
MIDLAND, TX 79701		   X   X   Chairman and CEO  

Signatures

 /s/ Cary D. Brown   03/15/2010
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) On March 11, 2010, the reporting person exercised 20,000 vested unit options at an exercise price of $17.00 per unit, and in connection with such exercise, to cover the exercise price and tax withholding obligations, agreed to transfer the units to be received upon such exercise to the Issuer in exchange for a payment by the Issuer of $22.99 per unit, the closing price of the Issuer's units on the NASDAQ Global Select Market on such date.
(2) The reporting person disclaims beneficial ownership of these securities except to the extent of his pecuniary interest therein, and the inclusion of these units in this report shall not be deemed an admission of beneficial ownership of all of the reported units for purposes of Section 16 or for any other purpose.
(3) Includes 4,391,408 units held by Moriah Properties, Ltd. ("Moriah Properties") and 33,672 units owned by Moriah Resources, Inc. ("Moriah Resources"). Moriah Properties and Moriah Resources are entities owned and controlled by Mr. Dale A. Brown and Mr. Cary D. Brown.
 
Remarks:
Chairman and Chief Executive Officer of Legacy Reserves GP, LLC, the general partner of Legacy Reserves LP.

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