It will be the first time that Prince William and Prince Harry come together to talk about their late mother, Princess Diana, in the upcoming documentary, 'Diana, Our Mother: Her Life and Legacy.'
The 65-minute documentary, which includes interviews with Sir Elton John, Rihanna, Diana’s family and childhood friends, will reveal what the loved "People's Princess" was like behind the closed doors.
It will also show Diana's sons William and Harry talking about their memories of their mother, and the last conversations they had before she was tragically killed in a car crash in 1997.
William remembers being on the phone to Princess Diana, but wanting to get back to playing.
“If I’d known now what was going to happen, I wouldn’t have been so blasé about it. Our phone call sticks in my mind quite heavily.”
Harry also regrets how short their last converstation was.
“I can’t necessarily remember what I said. All I do remember is regretting for the rest of my life how short the phone call was."
“Looking back on it now is incredibly hard. People deal with grief in different ways and my way of dealing with it was shutting it out and locking it up. I went through a period of sorting myself out.”
William and Harry describe their mum as "the naughiest parent," and a "total kid through and through."
“She realised there was life outside of palace walls and she wanted us to see that from a very young age.”
'Diana, Our Mother: Her Life and Legacy', premieres 8.30pm Tuesday July 25 on Three