Our mother would have been proud of marriage says Harry

The 26-year-old said he would be thinking of Princess Diana on the big day on April 29.

Harry is preparing for a gruelling trek in the Arctic with a group of wounded servicemen who are aiming to reach the North Pole.

Speaking about how his mind will turn to his mother, he said: “Myself, my brother and my father, there will be all sorts of people and the rest of the family that will be no doubt be thinking about it.

“And I hope she would be very, very proud that the big day has come upon him.

“We all thought that it was never going to happen for him. But it has happened, and I think everyone’s going to be very proud of him.”

Prince Harry is his brother’s best man, but with less than a month to go, he admitted he has not yet written his speech.

The third in line to the throne said he would be giving it with two of Prince William’s close friends, but they will have to watch what they say in front of the Queen.

He said: “I’m doing the speech along with a couple of his friends, so I will take the mickey out of him.

“I will tell a few stories, but I think my grandmother will be there, so I’ll have to be selective.”

Harry said he was looking forward to welcoming Kate into the Royal Family, and that she would become the sister he never had. “She’s a fantastic girl. She really is,” he said.