Hollywood royalty Gwyneth Paltrow and Cameron Diaz rubbed shoulders with actual royalty, Prince Philip, last night at the re-opening of The Arts Club in London's Mayfair. Gwyneth Paltrow and Prince Philip are both members of the prestigious members-only club, and Gwyneth and Cameron were reportedly invited to cast their fashionable eyes over the new decor. And with such an invitation, what else were the stylish stars to wear but their trusty LBDs? Gwyneth took to the stage with Amy Winehouse's old backing band, the Knights Before, and Mark Ronson donning a black sparkly mini dress with button detailing, a look that's great for the upcoming Christmas party season, (or any royal engagements you might have lined up!). Teamed with grey open-toe boots and her trademark tresses, Gwyneth pulls off effortless chic with perfection. Cameron Diaz was no wallflower though, teaming her short LBD with an over-sized navy blazer, black Mary Jane heels and a soft black leather bag. A tailored blazer in any colour is a great update for your LBD and is a great way to take your look from office to party. So, who do you think rocked the LBD best? Tell us now on Twitter @TeamLBD