No, we’re not talking about Kate’s Alexander McQueen wedding dress, but rather the sleek, sexy Roland Mouret gown she stepped out wearing last evening in London. Is the Duchess not the epitome of modern sophistication in this elegant (and full-sleeved!) white gown complete with a daring (for royal standards) slit up the front?! She finished the look with her trademark curtain of glossy brunette hair, simple jewel drop earrings, and a super-hot pair of sparkly Jimmy Choo Vamp platform sandals (her toes were painted with a classic red polish). This look head-to-toe is an amazing style for a formal, urban wedding, or even as a glam number two look for your evening reception. We heart.