Britney Spears has filed a petition for divorce from Kevin Federline.

Spears has hired powerhouse celebrity divorce lawyer Laura Wasser, who has repped a number of celebs, including Angelina Jolie, Nick Lachey and Kiefer Sutherland. We're told Reese Witherspoon and Ryan Phillippe asked Wasser to rep both of them in their split, but Wasser declined for personal reasons...Source: TMZ