Keira Knightley Refuses to Show Off Her Bum

Actress Keira Knightley may have no problems stripping off on screen. But the "Atonement" star wouldn't love to show off her bum.

Keira confessed she isn't shy when she should bare all. However, she doesn't want others to see her bum. "I don't really have a problem going topless, but my bum is a different matter," said the "Pride and Prejudice" star. "I like to have a body double for that. Other than that I don't have any problem with my body," she added.

The 23-year-old beauty recently revealed that she talks about sex life with her mom Sharman Macdonald. "Mum and I would always talk about sex. She'd come up to my room, have me roll her cigarettes and then tell me I'd have to have one with her," Keira told Glamour magazine.

The actress went on saying of her relationship with mother, "It's not the typical mother-daughter thing but we're extremely close." She added to the magazine, "Mum's a bit mental in a good way. She's this chilled-out hippy mother. My house was always the one where my brother and his mates would be drinking when they shouldn't be."

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