Middleton wore a sleek black coat dress pinned with the poppy brooch that has served as a symbol of remembrance since World War One. 8 She wore a sleek black coat dress.

Here, WWD looks back on some of the iconic British royal's most memorable birthday outfits, featuring the classic little black dress, vibrant colors, playful proportions and more. Princess Diana, 1997 ...

This dress was truly fit for a princess. A garment worn by the late Princess Diana was sold during the Unstoppable: Signature Styles of Iconic Women in Fashion event by Julien's Auction on Jan. 18 ...