He may not have been the Best Man, but he's definitely the best guy!
Apart from the happy couple, no one seemed to enjoy the day more than George's Monuments Men costar.
As he was whisked on a water taxi from one location to the next, surrounded by lovely ladies, Bill entertained onlookers and even gave a comical wave to the paps and just looked to be having the time of his life!
Obviously you don't have to be a charming movie star to have Bill at your wedding, but it couldn't hurt. LOLz!
[Image via Ramey Pix.]