UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 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): September 23, 2010

MATTEL, INC.

(Exact Name of Registrant as Specified in its Charter)

(310) 252-2000

(Registrant’s telephone number, including area code)

N/A

(Former Name or Former Address, if Changed Since Last Report)

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:

On September 23, 2010, Mattel, Inc. (“Mattel”) entered into an Underwriting Agreement with the underwriters named therein pursuant to which Mattel will issue $500 million aggregate principal amount of senior unsecured notes, consisting of 4.35% Notes due 2020 (the “2020 Notes”) and 6.20% Notes due 2040 (the “2040 Notes” and collectively with the 2020 Notes, the “Notes”), upon the terms and conditions set forth therein. The Notes will be governed by the terms of the Indenture between Mattel and Union Bank, N.A., dated as of September 23, 2010 (the “Indenture”). Mattel intends to use the net proceeds from the sale of the Notes for general corporate purposes, including repayment of outstanding debt maturing in 2011.

Mattel will pay interest on the Notes semi-annually on April 1 and October 1, beginning April 1, 2011. The 2020 Notes will mature on October 1, 2020, and the 2040 Notes will mature on October 1, 2040. The Notes are senior unsecured debt obligations of Mattel and will rank equally in right of payment among themselves and with all of Mattel’s other present and future senior unsecured indebtedness.

The Notes have been registered under the Securities Act of 1933 (the “Act”) pursuant to a Registration Statement on Form S-3 (No. 333-169539) (the “Registration Statement”) previously filed with the Commission by Mattel under the Act. Copies of the Underwriting Agreement and the form of the Notes are filed as exhibits hereto and incorporated herein by reference.

Mattel hereby files the following exhibits to, and incorporates such exhibits by reference in, the Registration Statement which was filed on September 23, 2010 and supplemented by the Prospectus Supplement filed with the Securities and Exchange Commission on September 23, 2010, or otherwise pursuant to requirements of Form 8-K:

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SIGNATURES

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.

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EXHIBIT INDEX

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