Best man, Prince Harry, is taking on an extra role at the royal weddingâ€¦party planner.
Prince William's younger brother is said to be extremely involved with plans for the evening reception, a private party for 300 of Will and Kate's closest friends and family.
His goal, reportedly to make it an evening his brother and new sister-in-law will never forget.
He's planning for the celebration to last until 6am, well past the midnight end time when most British weddings call it a night.
ABC royal contributor, Katie Nicholl, reported in the Daily Mail that "sources close to William and Harry have instructed aides to plan a proper 'knees up', and courtiers are expecting it to carry on into the next day."
So don't expect the austerity of the reception venue to dictate the evening's mood. Nicholl told ABC News "It may be a party taking place at Buckingham Palace, but rock it will."
In fact, Buckingham residents, Queen Elizabeth and Prince Philip, won't even be at the evening reception.
The Mirror reports that Prince William's grandparents will head to Windsor Castle, "leaving their home in the hands of the younger royals."
Prince Harry has arranged for the DJ to play into the early hours, so for those guests still dancing at the end of the night? A "survivors" post-wedding breakfast at 6 a.m.
According to Nicholl, caterers are preparing bacon sandwiches and "fry-ups."
The Queen is throwing her own morning reception immediately following Prince William and Kate Middleton's ceremony at Westminster Abbey.
Looks like the royal couple is getting two royal wedding breakfasts.