Costume of The Duchess left Keira gasping

London (ANI): Oscar-nominee Keira Knightley has revealed that the dresses she had to wear while shooting her new film 'The Duchess' left her gasping. The film features her in the role of the 18th century socialite Georgiana Cavendish, the fashion-loving Duchess of Devonshire whose life has often been compared with Princess Diana's.

Knightley said that the costumes made for her role were really very elegant, but insisted that they were not comfortable at all. "The costumes were fantastic but not terribly comfortable you can't breathe in those things," the Daily Express quoted her as saying.

The Duchess opens in cinemas across Britain on Friday.