Cracking dad jokes before he was even a dad.

Two princes — Prince William and Prince Harry — and a harpist walk into a royal wedding. It's not exactly the most common joke setup, but according to harpist Claire Jones, who performed at William's wedding to Kate Middleton, it's exactly what went down during Will's wedding speech. To commemorate the 10th anniversary of the royal wedding that enthralled the entire world and gave us the Cambridges as we know them today, Jones reflected on a joke William casually threw at his brother during the wedding's afternoon reception at Buckingham Palace.

"He made a lovely little remark about me," Jones told People. "The first thing he said to me was, 'Did you hear what I said in my speech?' I said I did, but I asked him to remind me because I hadn't heard it all. He said, 'Thank goodness Claire turned up to play the harp because otherwise, we'd have to get my brother to play it instead."

The Wedding of Prince William with Catherine Middleton
Credit: Photo by George Pimentel/WireImage

"He thought that was hilarious," Jones said, confirming any speculation that William's dad jokes came long before he became a real-life dad. "I thought it was quite funny he said that. He was very accommodating and warm. I wished them well, and I said I hoped they would have a happy and joyful life together."

People adds that Jones held the title of Official Harpist to the Prince of Wales from 2007 to 2011 and she considered performing at the wedding to be an honor. Though she didn't get to attend the actual wedding, she watched it on TV like the rest of us before slipping into an Alexander McQueen outfit (not like the rest of us) to perform for the royals and all their guests.

Royal Harpist Claire Jones
Credit: Photo by Dominic Lipinski/PA Images via Getty Images

"The first member of the royal family to thank me was Prince Harry," Jones said. "He was really, really down-to-earth, very friendly and easy to talk to. Straight away he said, 'Thank you for being here and taking the time to play. It sounds wonderful.'" And although Harry didn't get the chance to try his hand at the harp, Jones said that a few very special guests did. 

"The little ones wanted to have a go on the harp," she said of the bridesmaids and flower girls. "They were really going for it with their little hands going up and down the harp. The Prince of Wales is a family man and was really enjoying it."