When Kate Middleton married Prince William in 2011, she wore a wedding gown designed by Sarah Burton of Alexander McQueen. The intricate lace appliqué on the bodice and sleeves of the Duchess of Cambridge's gown paid homage to Grace Kelly's bridal dress and the sheerness of the trailing veil revealed Kate's vintage headwear as the 1936 diamond 'Halo' tiara by Cartier that the Queen loaned to her for her "something borrowed."