Kate Middleton and Prince William put aside thoughts of their own nuptials Saturday and attended their first wedding together since going public with their engagement.
Prince William served as an usher at the North Yorkshire wedding of Harry Aubrey-Fletcher to Sarah Louise Stourton, which was also attended by Prince Harry and Princess Beatrice. Kate left the wedding with her future brother-in-law Harry and boarded a double-decker wedding bus, while Prince William drove himself to the reception party.
"Hello, hello," said Prince William, jumping onto the sidewalk amid camera flashes after the ceremony. "It's not my wedding yet."
The princess-to-be celebrated her 29th birthday on Sunday - her last as a commoner. She is quickly becoming a fashion icon and her outfit on Saturday certainly turned more than a few heads. Middleton, who is not often seen in public, appeared at the wedding wearing a black knee-length jacket held together by a diamond pin, with a sheer black top underneath. A mauve clutch matched her inches-high heels, and a black pill box hat topped off the outfit.
In honor of Kate's birthday, take a look back at how she went from awkward teenager to gorgeous fashionista: Slideshow: Kate Middleton's transformation
In 2002, Middleton walked the runway at a University of St. Andrews charity fashion show with ribbons and tight ringlets. (Getty Images via InStyle.com)