Variety reports that Sienna Miller has been cast for the upcoming Paramount Pictures live-action G.I. Joe movie. Ms. Miller can be seen in such films as Stardust and Casanova. (Personally, I loved her in the short-lived Keen Eddie.)

Read more at Variety.com and keep up with all the latest G.I. Joe news here.

And speaking of the Baroness...

Check out this hysterical clip from G4's Attack of the Show.