Our friends the Hereditary Grand Duke and Grand Duchess of Luxembourg were there too.This is not the best angle on Stéphanie's suit, but she's got a little purple going on, and she's trying.
Charles and Camilla traveled to Belgium as well, attending the reopening of Hougoumont Farm. They also visited the site of the battle with the current Duke and Duchess of Wellington (here's a video).
A good day for cream outfits all around, I'd say.
Photos: via Getty Images as indicated