The main biographer of the late Princess Diana is speaking out this week to say that she would be “very upset” if she were alive to see the rift between her sons Prince William and Prince Harry.

“Diana said to me quite clearly on several occasions that she saw Harry as the wingman for William in what would be a very solitary, somber job as future king,” Andrew Morton, who secretly collaborated with Diana on his 1992 book, “Diana: Her True Story,” said in an interview on Friday.

“She would have been very upset at the way these two have split apart,” he added.

Diana was only 36 years-old when she was tragically killed in a car crash back in 1997. She would have turned 60 this coming Thursday, and to mark the occasion, her sons are set to host a ceremony at her former home of Kensington Palace to unveil a statue in her honor. William and Harry have reportedly “insisted” on giving separate speeches, indicating that their feud is going just as strong as ever, according to Page Six.

People Magazine reported that Harry’s wife Meghan Markle stayed behind in California with their two children, Archie and Lili. The palace said in a statement last year that the statue of Diana was “commissioned to mark the twentieth anniversary of her death and recognize her positive impact in the UK and around the world.”

“The statue will be installed in the Sunken Garden of Kensington Palace on 1st July 2021, marking The Princess’s 60th birthday,” the statement added. “The Princes hope that the statue will help all those who visit Kensington Palace to reflect on their mother’s life and her legacy.”

“Prince William and Prince Harry will attend a small event to mark the unveiling of a statue they commissioned of their mother, Diana, Princess of Wales, in the Sunken Garden at Kensington Pace on Thursday 1st July,” another statement from Kensington Palace read. “In addition to close family of Diana, Princess of Wales, members of the statue committee, the sculptor Ian Rank-Broadley, and garden designer, Pop Morrison, will also attend.”

“Further details about the statue and garden will be provided on the 1st July,” the statement concluded.

Kensington Palace have made their first announcement about the Princess Diana statue unveiling on July 1. Prince Harry and Prince William will be joined at the Sunken Garden event alongside the statue committee, sculptor Ian Rank-Broadley, and garden designer, Pip Morrison. pic.twitter.com/e9FbBKJJpI

— Omid Scobie (@scobie) June 25, 2021