Spears' spokeswoman, Nicole King, confirmed that the necessary legal documents were filed last week.

The singer, 22, married Federline at a private home in Los Angeles with 20 to 30 people attending.

Days later, celebrity gossip magazines questioned whether the event was a hoax because no paperwork for the marriage could be located in any government office.

Federline, 26, has said the delay was caused when the couple moved their wedding date up to Sept. 18 as word leaked out that they were planning to be married on Oct. 16. Moving the date up a month, he said, did not give their lawyers time to finish their prenuptial agreement.

Spears and Federline, who began dating early this year, announced their engagement in June.

Federline appeared in the movie You Got Served and performed as a backup dancer for singer Justin Timberlake, Spears' former boyfriend. He is the father of two children with actress Shar Jackson of TV's Moesha.