Sienna Miller is the Baroness

It appears that Stephen Sommers has found his woman for Baroness in the upcoming live action G.I. Joe film in Sienna Miller. Variety reports that Miller has signed the dotted line to play Baroness, the raven-haired femme fatale who is a thorn in the side of G.I. Joe. This is an interesting casting I think, but she is a good actor that definitely has the potential to make this role work. In the same article, Variety mentions that the release date for the movie is set for August 7, 2009. Awesome. Miller is the Baroness