Keira Knightley has said she doesn't worry about her appearance but says that being pretty is a double-edged sword when it comes to landing acting roles.

The 29-year-old beauty told Madame Figaro magazine, "I never think about beauty. Supposedly being pretty is a double-edged sword; your look gets you certain roles, but disqualifies you from others. That's the way the industry goes."

The face of Chanel's Coco Mademoiselle perfume added that in her everyday life she isn't as theatrical as her roles make out, "Thanks to make-up, good lighting and couture gowns. I play a role and become the representation that people expect of me. But it's part of my job. Transforming yourself is also part of an actor's job. On the one hand, there's the public image of me, and on the other, a private person."