View the Gallery / 12 Photos »

The Duke and Duchess of Cambridge (Wills and Kate) left Clarence House with Prince Charles and Camilla, Duchess of Cornwall for the evening reception hosted by the groom’s father.  It will be a night of dinner, dancing and speeches as both Prince Harry and Michael Middleton are expected to give toasts, according to the Daily Mail.

Catherine stepped out in her second gown of the day, a white silk gown with diamante embroidery wrapped around her tiny waist, also designed by Alexander McQueen.  Princess Ann, Princess Royal and her husband, Timothy Laurence were snapped en route to the party as well as her daughter, Zara Phillips and fiance Mike Tindall.

PHOTOS: Remember When Catherine, Duchess Of Cambridge Donned Short Shorts???

Guests will party in states rooms transformed for the party, where the couple and their friends plan to dance into the wee hours of tomorrow morning.  Queen Elizabeth and Prince Philip have loaned Buckingham Palace to their grandson for the evening, choosing to leave the city for the weekend.