Prince William has admitted that he "barely slept" the night before his wedding to Kate Middleton.
He revealed that he was so excited that he only got about 30 minutes of sleep.
In new documentary Elizabeth: Queen, Wife, Mother, he said: "I hadn't slept at all that night because obviously all the crowds were on The Mall. They were singing and cheering all night long.
"So, the excitement of that, the nervousness of me, and everyone singing meant I slept for about half an hour.
"So when I did get up in the morning, I can say that I had prepared myself totally by that point."
The couple were married at Westminster Abbey in April 2011 with the ceremony watched by millions around the world.
The prince admitted that he was worried about tripping over because of the spurs attached to his boots.
He said: "The hardest thing was trying to walk down the stairs with my spurs on, sideways.
"I had visions of myself and my brother Harry colliding and crashing down the stairs together."
Elizabeth: Queen, Wife, Mother airs on STV on June 1.
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