Sexy Keira Knightley

Keira Knightley is "on her way" to becoming a nudist.The stunning 'Atonement' actress is quickly becoming known for her willingness to bare all in films, but insists it wasn't a conscious decision.She told US chat show host Ellen DeGeneres: "I don't know why it happened this way. People ask me to pose naked and I just say yes! I find it vaguely liberating."I hope I don't become a nudist, but I'm definitely on my way!"When she does wear period costumes in her films, Keira - who can soon be seen in drama 'The Duchess' - still finds it difficult to breathe in stomach-restraining corsets.She laughed: "At the end of the day, it took me 10 minutes to learn to breathe normally. The corsets are such a workout too - heavy dresses and all that!"Oscar-nominated actress Keira also said she won't be doing her Christmas shopping in Britain's famous department stores, because they "terrify" her. She told USA Today newspaper: "Department stores scare the hell out of me, they terrify me! This time of year, I can't handle it. I can't quite face the hordes of people."