Keira Knightley has refused to have her breasts enhanced in publicity photos for her upcoming movie "The Duchess," the Daily Mail reports.

A source told the newspaper that movie bosses wanted the slender actress to appear more curvaceous, but "she has insisted that her figure stay in its natural state. She is proud of her body and doesn’t want it altered."

The actress, best known for role in the "Pirates of the Caribbean" films, had her breasts digitally enlarged to a C-cup in the U.S. publicity photos for her 2004 film "King Arthur."

In 2007, the actress told Britain's GMTV that "I would love to have t--s! I would love to have Monica Bellucci's figure. But I'm never going to get it. I'm naturally who I am. Surgery is far too frightening. I couldn't."

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