Prince William already got his Bachelor/stag party out of the way -- so what will England's future King be doing on April 28?
"William asked Harry to spend the night at Clarence House, the night before the wedding," a palace source tells Us Weekly of William, 28, and sibling Prince Harry, 26.
"It'll be great for the two brothers to be together before the big day. I'm sure Harry can help William with any last-minute nerves."
Indeed, although his wedding to Kate Middleton is a week and a half away, the groom-to-be has still found ways to blow off some steam. On Tuesday, for instance, while Middleton, 29, was shopping for honeymoon gear in the King's Road district, William played a soccer match with some pals nearby in the Battersea neighborhood.
The Prince and seven of his friends squared off against a team of staffers from rock radio station XFM.
"William plays a good game!" an XFM spokesperson tells Us. "His team won 5-0."
According to a source, William and his friends just "showed up to the park looking for another team to play. You wouldn't have thought that that was the future King of England who was up for a kick about, but it was! Everyone was surprised."
At one point in the game, William "took a knock from one of the other team's players at one point, but he carried on playing...he knows what he's doing."
After the match, players approached the royal and wished him good luck for the big day, the source adds. "He seemed confident and looking forward to the big day, but maybe nervous. One of the lads said 'good luck' and William said, 'thanks, I need it!'"
For more on the Royal Wedding, including rare photos, interviews with family and friends, details on Kate's new life as a princess and a tour of their lavish homes, order a copy of Us Weekly's Will & Kate: The Royal Wedding now.