04/29/2011 11:03 am ET | Updated Jun 29, 2011

Chelsy Davy's Royal Wedding Dress By Alberta Ferretti

Prince William's younger brother Harry has had a very public on-again, off-again relationship with Chelsy Davy.

But it is safe to assume that the couple is back on, considering the blond babe was on hand for the royal wedding. The 25-year-old arrived at the ceremony in an off-the-shoulder jacket and matching aqua shift dress -- one of two Alberta Ferretti outfits she had made for her by the Italian design house for the day. Matched with a gray lace Victoria Grant hat and nude patent-leather pumps, Davy looked smashing!