United States Securities and Exchange Commission Washington, D.C. 20549

FORM 6-K

Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934

For the month of December 2009

Aracruz Celulose S.A.

Aracruz Cellulose S.A. (Translation of Registrant’s name into English) Av. Brigadeiro Faria Lima, 2,277—4th floor São Paulo, SP 01452-000, Brazil (Address of principal executive office)

(Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.)

(Check One) Form 20-F þ  Form 40-F o

(Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1))

(Check One) Yes o  No þ

(Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7))

(Check One) Yes o  No þ

(Indicate by check mark whether the registrant by furnishing the information contained in this Form is also thereby furnishing information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.)

(Check One) Yes o  No þ

(If “Yes” is marked, indicate below the file number assigned to the registrant in connection with Rule 12g3-2(b). 82- ..)

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Aracruz hereby provides the market with a free translation of its Interim Financial Statements for the Quarters Ended September 30, 2009 and 2008, in Brazilian GAAP, and Special Review Report of Independent Registered Public Accounting Firm.

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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, thereunto duly authorized.

Date: December 17, 2009

ARACRUZ CELULOSE S.A. By: /s/ Marcos Grodetzky Name: Marcos Grodetzky Title: Investor Relations Officer

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