ROYAL FAMILY NEWSPrince William Will 'Never Forgive' Princess Diana’s Brother Over Explosive King Charles Claims: Report
Prince William reportedly won't forgive his uncle Charles Spencer following the publication of his recent memoir, 'Swan Song: My Sister, Diana.'
Sept. 24 2026, Published 12:37 p.m. ET
Prince William is reportedly fuming over uncle Charles Spencer's new memoir, Swan Song: My Sister, Diana.
The book chronicles key parts of the late Princess Diana's life, as well as her marriage to the then-Prince Charles.
King Charles Was Diagnosed With Cancer in 2024
King Charles' health is 'already precarious' amid his cancer battle.
A source recently divulged to Closer magazine the memoir is "the absolute last thing that the king needs right now" as his “health is already precarious."
Charles, 77, was diagnosed with a form of cancer in 2024 and the book allegedly has sent his blood pressure "sky high."
Prince William Is Concerned About the Book 'Taking a Toll' on King Charles' Health
Princess Diana and King Charles were married from 1981 until 1996.
"He’s been told to keep his life as stress-free as possible to help in his cancer fight," the insider noted. "It’s affecting him terribly."
The Prince of Wales, 44, is also "adamant that the shock and stress of this humiliation is taking a toll" on the sovereign's health. The source then added William "will never forgive" Spencer, 62, for "putting the king through this."
The explosive book is Charles' “worst nightmare and [it is] the worst possible time for his past to be coming back to haunt him.”
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- Princess Diana's Brother Makes Startling Claim About King Charles' Reaction to His Ex-Wife's Death in New Book
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Charles Spencer Alleged King Charles Said the People Would 'Forget' Princess Diana After Her Passing
Charles Spencer made several allegations about King Charles in his memoir about Princess Diana.
Spencer made several claims in his book about Charles, including him reportedly saying the public would soon "forget" about Diana after her death in August 1997.
Another allegation the British peer penned was that the king allegedly "was in love with his valet."
Buckingham Palace released a rare statement on September 21 about Spencer's memoir, saying: “While we do not comment on books as a matter of principle, His Majesty is mindful that the pain of fraternal grief can cloud reason, affect judgment and color memory in ways others do not recognize, even many years after such a loss."
Spencer previously noted the purpose of his book "is to tell the truth about Diana from her brother’s perspective."
Charles Spencer Told Prince William and Prince Harry About His Memoir at the 'Same Time'
Prince William and Prince Harry were both told about their uncle's book ahead of time.
"I want to speak on Diana’s behalf and do so in an openly positive way," he said in a statement earlier this year.
The 9th Earl Spencer reportedly made William and his brother, Prince Harry, 42, aware about the memoir ahead of its September 22 release. The author told People earlier this month he told the Duke of Sussex and the Duke of Cambridge at "exactly the same time."
"And I can say that Harry is completely fine about it,” Spencer said, adding the prince's only concern was that there was nothing "embarrassing" about him in the book.
He continued: "I said, 'There isn’t.' I think they were actually worried where I was going up to with the book. It pretty much ends in 1997 with Diana’s death."
