Sienna Miller is enjoying “kicking butt” on her new movie.


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The British actress is revelling in the role of gun-toting villain The Baroness in upcoming blockbuster G.I. Joe.

She said: “It is really fun, and I get to really kick some butt. I am working out a lot and kickboxing and all that. But the best bit is that I’m doing that gun-twisting stuff. I am learning how to shoot properly and it’s all cool and a lot of fun.”

The Baroness has been described by film sources as a “raven-haired, sexy femme fatale skilled in espionage”, and appeared in the first ever issue of the G.I. Joe: A Real American Hero comic in 1982.

The movie follows the escapades of the elite G.I. Joe team who take on an evil organisation run by a notorious arms dealer. The cast also includes Dennis Quaid, Joseph Gordon-Levitt, Channing Tatum, and Marlon Wayans.

G.I. Joe – inspired by a famous 60s toy action figure which spawned the comic book series – is due to hit screens in August 2009.