Sienna Miller overwhelmed by workouts

Sienna Miller overwhelmed by workouts

Sienna Miller had a shock when she found out how much working out she would have to do for her role in GI Joe. "I think initially I was just completely overwhelmed," says Sienna. "I've never done fight training let alone been to a gym, so this was a whole new experience. But once I kind of realized what I was doing, learning how to fight was really fun. And it was a little bit of exercise, which is not so bad I suppose."