8-K

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM 8-K

CURRENT REPORT
Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

        Date of Report (Date of earliest event reported):  June 15, 2005

SONIC CORP.
(Exact name of registrant as specified in its charter)

Delaware (State or other jurisdiction of incorporation or organization)	0-18859 (Commission File Number)	73-1371046 (I.R.S. Employer Identification No.)
300 Johnny Bench Drive Oklahoma City, Oklahoma (Address of Principal Executive Offices)		73104 (Zip Code)

(405) 225-5000
(Registrant’s telephone number, including area code)

Check the appropriate box below if the form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

[  ] Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
[  ] Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
[  ] Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
[  ] Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Item 5.02.   Departure of Directors or Principal Officers; Election of Directors; Appointment of Principal Officers

    (d)       On June 15, 2005, the Board of Directors appointed Michael J. Maples to fill the open director position of Sonic Corp. (the “Registrant”) for a term expiring at the next annual meeting of stockholders of the Registrant. The Board appointed Mr. Maples to serve on the Nominating and Corporate Governance Committee and on the Compensation Committee of the Board of Directors.

Item 9.01.  Financial Statements and Exhibits.

    (c)       Exhibits.

    99  Press Release, dated June 15, 2005, announcing the appointment of Michael J. Maples to the Board of Directors

SIGNATURE

        Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

	REGISTRANT:
	SONIC CORP.
Date: June 16, 2005	By:	/s/ Stephen C. VaughanStephen C. Vaughan, Vice President and Chief Financial Officer

EXHIBIT INDEX

Exhibit No.	Description
99	Press Release, dated June 15, 2005, announcing the appointment of Michael J. Maples to the Board of Directors

EX-99

Exhibit 99

Contact: Nancy L. Robertson
   Senior Vice President of
   People & Communications
   (405) 225-5600

MICHAEL MAPLES, FORMER MICROSOFT EXECUTIVE, JOINS SONIC’S BOARD

OKLAHOMA CITY (June 15, 2005) – Sonic Corp. (NASDAQ/NM: SONC), the nation's largest chain of drive-in restaurants, today announced that Michael J. Maples has been named to its Board of Directors.

        After spending 23 years with IBM in marketing, product development and software strategies, Maples joined Microsoft in 1988, where he retired in 1995 as executive vice president of the Worldwide Products Group and member of the Office of the President. He currently serves as a consultant and advisor for Microsoft and is a member of the board of directors of Lexmark Corp., Motive Software and Multimedia Games, Inc.

        “The technology, product development and marketing knowledge Mike brings will greatly benefit Sonic and help us continue our forward momentum,” said Clifford Hudson, Sonic’s Chairman, Chief Executive Officer and President. “My fellow board members and I look forward to his participation as a director and to his counsel about the future direction of our company as we continue to build the Sonic brand.”

        Sonic, America’s Drive-In, originally started as a hamburger and root beer stand in 1953 in Shawnee, Okla., called Top Hat Drive-In, and then changed its name to Sonic in 1959. The first drive-in to adopt the Sonic name is still serving customers in Stillwater, Okla. Sonic has approximately 3,000 drive-ins coast to coast and in Mexico. More than a million customers eat at Sonic every day. For more information about Sonic Corp. and its subsidiaries, visit Sonic at www.sonicdrivein.com.

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