UPDATE: Kate Middleton just arrived in a Sarah Burton for Alexander McQueen lace dress. She looks very similar to Grace Kelly on her wedding day.
Guests are slowly starting to arrive to Abbey dressed to the nines in their wacky hats.
David and Victoria Beckham just arrived. He looks so sexy with his top hat. A very pregnant Victoria is wearing a black dress from her Spring line with a crazy hat on her forehead.
Diana's brother just arrived.
Rumor has it that Kate will change dresses three times.
Prince Harry's on-again, off-again ex Chelsy Davy arrived to the Abbey and already took her seat.
Elton John arrived with his husband David.
Two cars full of royal family members just arrived.
Prince William and Harry will leave for the Abbey in 15 minutes.
Madonna's ex Guy Ritchie just arrived with his pregnant girlfriend. Fun fact: Guy is Kate's fifth cousin.
The Prime Minister and his wife just arrived. She's the only guest so far that isn't wearing a hat. The royal invite specifically said that female guests must wear hats.
Prince William and Prince Harry just arrived in their military uniforms. Such cuties!
Kate Middleton's mother Carol just arrived to the wedding in a black sedan wearing a Katherine Walker dress.
The Duke of York, Princess Beatrice and Princess Eugenie are leaving Buckingham Palace.
The Duchess of Cornwall is wearing an outfit designed by Anna Valentine.
Most of the royal guests are wearing Philip Treacy hats and Jimmy Choo shoes.
The Queen just arrived. She's wearing yellow.
Prince Charles and Camilla just arrived.
The Maid of Honor Pippa, Bridesmaids and Pages depart for the Abbey.
Kate Middleton just arrived! She's wearing a long sleeved lace dress. Her hair is down. She looks gorgeous.
Prince William just told Kate "you look beautiful" awww
KEEP REFRESHING FOR UPDATES