Princess Diana's voice coach says the statue unveiling will be 'healing' for Prince William and Prince Harry

• Princess Diana's voice coach Stewart Pearce spoke to Insider about the statue unveiling.
• He said it will be "healing" for William and Harry amid reports of a rift.
• The brothers will reunite for Diana's 60th birthday on Thursday.

Princess Diana's voice coach Stewart Pearce told Insider that the statue unveiling will be a time of "healing" for Prince William and Prince Harry.

The brothers are due to reunite on what would have been Diana's 60th birthday on Thursday, to unveil a statue in honor of their mother at Kensington Palace.

Rumors of a rift between the brothers have been ongoing since Meghan Markle married into the royal family in 2018, and were further amplified after Harry and Markle gave a tell-all interview to Oprah Winfrey in March.

"What the British press are not seeing is that these two young men are held in an extraordinary pact of grief," Pearce, author of "Diana The Voice of Change," told Insider. "They're not in a rift, they're talking to each other very easily."

Harry, William, and Kate Middleton were photographed in conversation at Prince Philip's funeral in April. There was speculation in the press at the time over whether this could signal the end to the rift, something which neither party publicly commented on.

"I feel that when we see that statue unveiled, it's going to be an extraordinary sort of healing energy for the entire family, particularly for the boys, and for the two ladies, Meghan and Kate. It will be oil over troubled waters," Pearce added.

Diana sought out Pearce for voice coaching shortly after her BBC Panorama interview aired. The princess believed "she wasn't appearing to be as powerful as she wanted to be" on screen, Pearce previously told Town and Country.

The pair's sessions were kept a secret from the public, with Diana arranging her meetings with Pearce privately rather than through the palace, Pearce told Insider.

He shared some of his favorite memories of the princess with Insider ahead of the statue unveiling.

"We got on so well because we saw one another," Pearce said, adding that the princess was "totally authentic."

He said: "When she would come to my studio in Chelsea, the first thing she would say to me was: 'Do you have any washing up for me to do?' And so I would leave crockery for her, and cups and saucers. It was a way of keeping her grounded. Whereas, you know, when she would usually drink a cup of coffee it would immediately be whisked away by a servant."

"She did not assume a mask or a means of projecting herself into the world that seemed to be self-conscious or uneasy or tense or closed," he said. "She was so funny, so ordinary, but so extraordinary at the same time."

Representatives for the Duke of Sussex and the Duke of Cambridge declined to comment when contacted by Insider.