She popped in a canary-yellow Stella McCartney dress with an asymmetrical train. And this being a royal wedding ... welcome to the U.K. with an invitation to the wedding of the year.

Terry Fincher/Princess Diana Archive/Getty "Something blue" wasn't a good sign if it came in the form of Queen Elizabeth's outfit at a royal wedding ... The Queen wore a yellow ensemble when ...

Though most of us were not lucky enough to receive an invitation to the royal wedding ... magic of the wedding of the year. Specifically, by wearing the custom Stella McCartney yellow dress ...

Who perfected the royal wedding ... a yellow and white sheer fascinator. George is wearing a morning suit with striped pants and a beige vest Ellie Goulding stepped out in a flowing light blue ...

Guests and family alike break out their most fascinating fascinators and over-the-top trilbys for the big day The groom's royal cousins ... Eugenie sets off her bold blue floral Vivienne Westwood ...

An Associated Press caption for the upcoming wedding said ... newbies from Hollywood could be attending their first royal affair. The invitations to 600 guests described the high church ...