The Duke of Cambridge also said he got got just half an hour's sleep before last year's wedding to Catherine Middleton, which was watched by billions around the world.
In extracts released Tuesday from a forthcoming ITV television documentary to mark the queen's jubilee, William said he went to his grandmother with his concerns about the guest list drawn up by royal officials.
"There was very much a subdued moment when I was handed a list with 777 names on -- not one person I knew or Catherine knew," he said.
"I went to her (the Queen) and said, 'Listen, I've got this list, not one person I know -- what do I do?' and she went, 'Get rid of it. Start from your friends and then we'll add those we need to in due course. It's your day'."