Kate Middleton Recycles Slinky, Long-Sleeved Gown at Mandela Premiere With Prince William

Kate Middleton may not hail from Hollywood, but she can work a red carpet with the best of 'em. Attending the London premiere of Mandela: Long Walk to Freedom with Prince William on Thursday, Dec. 5, the Duchess of Cambridge looked positively ravishing. See more pics of Middleton here.

Prince George's parents arrived at Leicester Square at exactly 7:15 p.m., and took their time making their way into Odeon Leicester Square Cinema. Middleton, 31, was radiant (and, of course, slim) in a slinky, cream-colored Roland Mouret gown -- the "Lombard" -- which she accessorized with a black clutch, black heels, and a sparkling statement necklace from Zara. (It retails for just 20 pounds!) Her hair, now a richer, darker brown, was pulled back into a low ponytail.

The Duchess has actually worn the Lombard before -- to a dinner at Claridges in 2012. In January, designer Mouret spoke about the gown with the Sunday Telegraph.

"I think it was quite fantastic that there was a split up the front," he said. "That picture of a woman when you catch a little of the leg, that's what you want to see. It's that notion of privacy...It’s something that should be for her husband and she just shows a glimpse of it."