The cast of Andrew Stanton's new film has just found another addition. According to The Hollywood Reporter, Willem Dafoe has signed on for John Carter of Mars.

Dafoe joins a cast that already includes X-Men Origins: Wolverine actors Taylor Kitsch and Lynn Collins. The film centers around a Civil War soldier who finds himself transported to Mars in the midst of a planetary war. Dafoe will portray Tars Tarkas, the leader of the Thark race, who believes they must avoid war to survive.

Andrew Stanton is directing from a script he co-wrote with Mark Andrews, which is based off the Edgar Rice Burroughs classic novel series. The film is planning on starting production in early 2010.