Keira Knightley confesses that she has "awful" skin and that she relies heavily on a dermatologist to keep her acne at bay.

"I do not have good skin. I've got really awful skin," Internet Media Database quoted the 20-year-old "Pirates of the Caribbean" beauty, frequently voted one of the world's sexiest women in the world, as saying.

When quizzed on her perfect on-screen complexion, she revealed: "It's about four hours of make-up actually. And I have a very good dermatologist."