The show drew a stellar cast of high-profile figures and celebrities including Samantha Cameron , The First Secretary of State , Lord Mandelson , Gwyneth Paltrow , Victoria Beckham , Liv Tyler , Emma Watson , and Mary Kate Olsen , and the top echelon of the world 's fashion press , including American Vogue 's Anna Wintour , French Vogue 's Carine Roitfeld and Glenda Bailey of American Harper 's Bazaar .