As best man at his brother's April 29th wedding to Kate Middleton, Prince Harry will be giving a speech. But what Harry, 26, has to say about Prince William might be very different if the Queen weren't going to be in attendance.
"I will have a few stories," Harry told Bob Woodruff on a Good Morning America segment airing Thursday. "I think my grandmother will be there so I have to be selective, as one might say."
Though Harry admits he hasn't begun working on his toast just yet, he acknowledged, "It's a big deal; It a really big decision for (William) to bring Kate into the family."
For his part, Harry is welcoming Middleton, 29, with open arms.
"To have a big sister is very, very nice," he said. "She's a fantastic girl. My brother is very lucky. She's very lucky to find my brother. The two of them are a classic match."
Harry said he hopes that their mother, the late Princess Diana, would be proud of William's choice, adding that their father, Prince Charles, is "over the moon" about the upcoming wedding and is even helping select the processional music for the big day.
Alluding to William, 28, and Middleton's eight-year on-again-off-again relationship, Harry noted, "We all thought that it was never going to happen for him. But it has happened and everyone is really proud of him."
There was one topic, however, Harry wouldn't say a ward about -- what went on at the royal bachelor party in Norfolk last weekend.
"I'm not going to talk about that," he said. "Nice, try getting me to talk about the stag weekend. That was never going to happen."
For more on the Royal Wedding, including rare photos, interviews, and details on Kate's new life as a princess, order a copy of Us Weekly's Will & Kate: The Royal Wedding.