Former Royal Ballet principal dancer Darcey Bussell poses in a Valentino black ruffle-edged cocktail gown from 1970-1971, in London, December 7, 2009. The dress previously owned by U.S. actress Audrey Hepburn will be auctioned in London on Tuesday, where it is expected to sell for 4,000-6,000 pounds (6,500-9,800 USD). REUTERS/Suzanne Plunkett (BRITAIN - Tags: ENTERTAINMENT FASHION SOCIETY BUSINESS)