KEIRA KNIGHTLEY'S EXTRAVAGANT BUTT

Keira Knightley

Keira Knightley's on set trailer on her new movie had to be extended to accommodate her extravagant butt decorations. The 22-year-old star - who wears a series of elaborate 18th century costumes for her new movie 'The Duchess' - has such a tiny derrière the huge bottom flounces on her traditional gowns had to be extra large meaning the actress needed more room to store them all. A source said: "Keira has one of the smallest behinds in the cast and so we had to make the flounces on the back of her gowns even bigger than normal. The smaller the bottom, the more abundant the ornamentation required. "Add to that the large hoop undergarments known as panniers which widen the gowns, and each garment takes up a huge amount of space. We needed more room to accommodate all Keira's wardrobe so had no choice but to extend her trailer." Kiera - who plays British socialite Lady Georgina Spencer who becomes the Fifth Duchess of Devonshire - was fascinated with the duchess' close friendship with Lady Elizabeth Foster, which was sometimes construed as a sexual relationship. She told Britain's Daily Mail newspaper: "Some of the letters are like love letters. In modern ways you might say they're lesbians. But I don't think that they ever had a physical relationship. "In any case that friendship goes a little bit wrong because she f***s my husband. Lovely!"