Kate Middleton And Prince William Dazzle At London 'War Horse' Premiere

Jan. 8 2012, Published 4:05 a.m. ET

Kate Middleton proved she's red carpet royalty as she stepped out at the U.K. premiere of War Horse looking lovely in lace.

The Duchess of Cambridge showed off her super slim figure in a floor length Alice Temperley ivory and black gown and wowed the crowds at her first royal film premiere.

Her husband, Prince William, accompanied Kate and looked dashing in a black tuxedo and bow tie.

The couple greeted the film's director Steven Spielberg and lead actor Jeremy Irvine, who was thrilled to have royal support.

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"The fact that they're here to watch my fat face on a cinema screen is bizarre," he said. "It's such a thrill. And also for their charity. It's a great cause."

The event benefited the Foundation of Prince William and Prince Harry.

Kate turns 30 tomorrow but palace officials says she with celebrate with a 'low-key and private' affair.

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