Meghan Markle & Princess Diana's off the shoulder dresses compared Express.co.uk Princess Diana's 50 Best Dresses Royal Family Fashion N A1307 One Shoulder Full Sequin Fit & Flare Prom Gown with Cut Out Diggz Formals In March 1997, Diana, Princess of Wales, was photographed by Mario Testino in London for the cover of the July issue of Vanity Fair. On the cover, Diana chose an Atelier Versace Sparkly Dark Red One Shoulder Sheath Long Prom Dress with Slit Formal formalgowns One Shoulder High Slit Prom Dress 2011P1066