The interview will air on NBC on June 18 on editions of The Today Show and Dateline NBC. Extracts of the interview were presented yesterday.
The two young men, who were only 15 and 13 when their mother died in 1997, responded to questions concerning the life of their mother, her death, and her legacy.
"I think people will always have a fascination about her," said Harry, now 22. "And journalists believe there’s a need to read about her a need to be reminded about her…I can’t really ever see it ending really…"
"She wasn’t always herself in front of the camera," revealed Harry. "She was much more natural behind the scenes, when there was no one else there and she could be herself. I don’t know if it’s the right thing to say, but she was quite good-acting if you know what I mean."