Kate Middleton's Fashion and Etiquette at Royal Events.

Kate Middleton wore a bespoke white Alessandra Rich dress with brown polka dots, two-tone pumps from the same brand, and a black Philip Treacy hat with polka dot detailing to the Garter Day service at St George’s Chapel in Windsor. The ensemble nodded to Princess Diana and Audrey Hepburn’s Eliza Doolittle character in “My Fair Lady.” Middleton also wore a custom emerald green Andrew Gn coat dress with a satin trim to Trooping the Colour, featuring blue jeweled embellishments that matched her sapphire engagement ring and earrings that had once belonged to Princess Diana.