The Duke of Cambridge has revealed that his wedding was the one moment since his mother's death he wished she could have been there with him.
William's poignant tribute to Diana, Princess of Wales was echoed by his brother Prince Harry who described her as having the "best seat in the house" during the Westminster Abbey service.
The second-in-line to the throne also said it was "very sad" that his mother would never meet his wife Kate.
The Duke and Harry's comments came in an interview with ABC News broadcaster Katie Couric ahead of this weekend's Diamond Jubilee celebrations.
Asked if he missed his mother on his wedding day last April, William replied "It was very difficult."
He added: "I was sort of mentally prepared so I didn't want any wobbly lips or anything going on. It's the one time since she's died, where I've thought to myself it would be fantastic if she was here.
"And just how sad really for her, more than anything, not being able to see it. Because I think she, she would have loved the day and I think, hopefully, she'd be very proud of us both for the day.
"I'm just very sad that she's never going to get a chance to meet Kate."
Harry joked and looked at ease during the royal wedding watched by an estimated global television audience of billions but admitted he had the jitters.
He said: "I was massively nervous. Everybody was nervous. And the whole thing was a bit of a blur to be honest, because, there was God knows how many millions or billions of eyes focused on us..."
Asked if it was difficult not having Diana with them, he replied: "Of course it was."
He added: "You know, I think she had...the best seat in the house probably, but, yeah she would have loved to have been there."
Harry was interviewed in Brazil in March after his Diamond Jubilee tour of the Caribbean, while William spoke to the broadcaster recently at Clarence House.
Celebrations over the coming four-day long extended Bank Holiday weekend will allow the nation to mark the Queen's Diamond Jubilee.
She came to the throne aged just 25 after the death of her father George VI in 1952 and has remained a pivotal figure in British life.
The prince agreed with the suggestion that the Queen's ability to change had helped the monarchy survive.
He said: "Yes, without a doubt. She's managed to get the family to move with the times.
"And I think that's incredibly important. You can't get stuck in a sort of an old age situation when everything else around you is changing. So you have, you have to go with it."
Harry paid tribute to the Queen during the interview describing her as your average grandmother.
He described her as: "Really very, very normal. Very relaxed. But you know, she obviously takes a huge interest in what we all do." "You know, that's her children as well as her grandchildren."
The prince added: "She wants to know which charities we're supporting, how life is going in our jobs and such.
"So you know, she has a vested interested in what we do."
Speaking about the experiences he gained from his Diamond Jubilee trip Harry said: "This tour itself has been a brief insight as to what she had to deal with at a very young age.
"What she's achieved and what she's done and, you know, at the age of 25, confronted with the world's media. You know, and you can see it in her face now.
"You can see it in the way that she parades herself, is just immaculate. And she's learned it from all the years of experience basically."
Take a look at some more shots from the documentary below