Catherine, Duchess of Cambridge picked Alexander McQueen yet again! For tonight's A Night of Heroes awards show at London's Imperial War Museum, the royal chose a black strapless gown by McQueen creative director Sarah Burton, the same designer behind her famous wedding gown. This marks one of the first times we've seen her in a strapless formal look, though she has done alternative necklines like one-shoulder and criss-crossing straps before. The Duchess played up her bare shoulders with a stunning diamond and ruby statement necklace, a treasure from her big assortment wedding gifts, according to People. See more photos of the dress and her accessories in the gallery now.