Eva Green says '300: Rise of an Empire' improved her bum.
The 33-year-old beauty, who plays warrior princess Artemisia in the upcoming feature, has credited the movie's rigorous and arduous action sequences with helping her firm up her posterior.
She told Empire magazine: "Oh, my God, it's very physically demanding. I feel like I'm smoking too much. It's very visceral and I've never done anything like it before, but I've always loved those Zhang Yimou [martial arts] films.
"I'm too much in my head usually and this is all in the body, so it's a good experience. I've got a good bum now!"
How do you guys keep fit? Best ways to tone that ass?
The French actress, who shot to fame alongside Daniel Craig in James Bond flick 'Casino Royale', plays mischievous henchwoman to Rodrigo Santoro's villainous Xerxes and she loved playing the femme fatale character.
She explained: "She's a very cool character. She's very ballsy and brave, and very much ahead of her time. She's Greek by birth but her heart is Persian. She had her whole family slaughtered before her eyes when she was a child and [Xerxes' father] King Darius rescued her and raised her as his own 'son'.
"I wouldn't say she's manly, but she's very strong, very badaboom."