Matt Dunham / AP

Please, I'm trying to think here!

It's destined to become an iconic image: Newlyweds William and Kate share a sweet kiss on a Buckingham Palace balcony, as the adoring crowds gathered below roared their approval.

Well, almost everyone approved. If you're 3, apparently, it was all just a bit too LOUD.

 Who is this little scene-stealer?

She's bridesmaid Grace Van Cutsem, the goddaughter of Prince William, the daughter of Lady Rose Astor and Hugh Van Cutsem -- close family friends who have known the prince since childhood. Grace's uncle, Edward Van Cutsem, was a pageboy at Prince Charles and Lady Diana's wedding. And we have a suspicion there's a royal nap in her near future.