Kate Middleton Sizzles in an Alexander McQueen Strapless Black Velvet Gown

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The Duchess of Cambridge chose another gown by Sarah Burton, who designed her wedding dress, for London's "Night of Heroes" awards.

Kate Middleton wore her sexiest gown yet at Monday night's "Night of Heroes" military awards event at London's Imperial War Museum.

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Prince William -- wearing a dapper tux -- escorted his wife, the Duchess of Cambridge, wearing a stunning simple strapless black velvet gown by Sarah Burton of Alexander McQueen -- the label of her  iconic wedding gown and wedding reception dress.

She also wore sparkly diamond jewelry that was a wedding present, and her long hair flowed in loose waves. As for all those ongoing pregnancy rumors, no sign of any royal bump in this fitted gown. 

PHOTOS: Royal Wedding Photos

It's being reported that the couple will spend Christmas at the palace and with her family. But it's also said that the entire royal family will be housed at Sandringham manor, Queen Elizabeth's sprawling retreat in Norfolk, England.

So many palaces, so little time.