The Princess of Wales also wore green to the banquet at Windsor Castle, a possible tribute to the Nigerian flag Layal Jade Tinubu attended a state banquet at Windsor Castle during Nigeria's first U.K.

The Princess of Wales rarely puts a foot wrong with her outfit choices, and fares just as well with capsule wardrobe pieces as fabulous evening gowns. Case in point? The Gabriela Hearst Marley dress ...