The Prince wore a replica of the gown worn by 60 previous royal babies, custom-made by the Queen's couturier, Angela Kelly. (As you can imagine, the original has probably taken quite a beating after 60 babies spit up on it.) The very long train (see below) definitely gives Kate's wedding gown a run for its money, so it's a good thing he doesn't walk yet.
Royal mum Kate Middleton decided to wear a matching cream outfit, which according to Richard Palmer, the royal correspondent at the Daily Express in London, is Alexander McQueen. She paired the frock with a matching Jane Taylor hat. It seems safe to say Kate will be avoiding chocolate sauce, coffee, and spaghetti today.
Aunt Pippa Middleton also opted for a pale-colored look, wearing a cream wool trapeze coat over a blush lace dress from London boutique Suzannah, with a matching pill box hat by British milliner Edwina Ibbotson, according to Grazia.
In preliminary pictures, Camilla Parker Bowles is also in cream and Queen Elizabeth is wearing blue.
You can watch a video of the adorable and well-behaved gurgling royal baby arriving at the chapel here.
Click through for a better look at the Royal Family's outfits.