Miller fit 'for first time in life' for GI Joe role

Sienna Miller had very mixed feeling about her fitness regime for 'G.I Joe: Rise of the Cobra'.

The actress had to undertake six weeks if intense fighting and martial arts classes ahead of starring in the action movie, and admits she was "reluctant" to exercise but was delighted by the results.

She said: "I had to get fit for the first time in my life, so that was entertaining. I was very reluctant, being English.

"I'm a good little scrapper now. I just couldn't believe it. I'd be like: 'Oh my goodness, I've got a muscle' but it's all gone to pot now."

Sienna particularly enjoyed getting the chance to play a 'baddie', The Baroness, as she found it more fun than many of her previous roles.

She added to Wales Online: "I strut the whole way through. It's great being the villain because you get the best props, the best guns, the best outfits.

"There was lots of squinting and pouting, you can really go for it on a film like this."