There may be royally bad blood between Prince William and Andrew Mountbatten Windsor.
The pair’s feud allegedly stems from a “rude” comment the disgraced ex-royal, 65, made about the Prince of Wales’ wife, Kate Middleton, 43.
Author Andrew Lownie claimed in his royal biography, “The Rise and Fall of the Yorks,” that William, 43, supported his father King Charles III’s decision to strip Andrew of his royal titles and honors.
Prince William and his uncle Andrew after attending The Order of the Garter Service at St. George’s Chapel, Windsor Castle in Windsor, England, on June 14, 2010. Getty Images
Prince William, Prince of Wales and Catherine, Princess of Wales attend a ceremonial welcome for The President and the First Lady of the Republic of Korea at Horse Guards Parade in London on November 21, 2023. Getty Images
“He [William] also loathes Sarah [Ferguson], Andrew’s ex-wife, and can’t wait for the day when his father throws them both out,” an excerpt from a source noted in the book, per Daily Mail.
The Prince’s uncle was tied to the late convicted sex offender Jeffrey Epstein and had allegations of sexual misconduct against him. Andrew has repeatedly denied the claims.
Andrew and King Charles attend Katharine, Duchess of Kent’s Requiem Mass service at Westminster Cathedral in London on September 16, 2025. Getty Images
The book added: “If Charles doesn’t, I guarantee you the first thing William does when he eventually becomes king is to get them evicted.”
The author went on to explain that William, 43, also got upset that Andrew and Ferguson, 66, attended Katharine, Duchess of Kent’s funeral in September.
“William, meanwhile, was ‘furious’ at being ambushed in this way, according to friends. He has been at pains to distance himself from his uncle and not be photographed with him,” Lownie alleged.
Princess Diana with Prince William, Sarah Ferguson and Andrew on Christmas Day on December 25, 1987. Getty Images
“He believes his father has not dealt with him with sufficient firmness and that Andrew — and Sarah Ferguson — have done much to undermine the good work of other members of the Royal Family.”
Lownie did not disclose the former prince’s alleged remark toward Middleton.
The Post reached out to Kensington Palace for comment.
Andrew, Prince William and Earl of Snowdon David Armstrong-Jones during the funeral of Prince Philip, Duke of Edinburgh on April 17, 2021 in Windsor, England. WireImage
Andrew was stripped of his royal titles by King Charles, 76, on Thursday after furor over his ties to Epstein erupted in the United Kingdom.
Late last month, a heckler asked King Charles if he had asked the police to cover up Andrew’s ties to the convicted sex offender.
The titles removed were Prince, Duke of York, Earl of Inverness, Baron Killyleagh and “His Royal Highness.”
The honors affected include Andrew’s Order of the Garter and Knight Grand Cross of the Royal Victorian Order.
Andrew, Sarah Ferguson and their daughters, Princess Beatrice and Princess Eugenie, in Wentworth, England, on August 5, 1996. Justin Goff Photos/Getty Images
“Prince Andrew will now be known as Andrew Mountbatten Windsor. His lease on Royal Lodge has, to date, provided him with legal protection to continue in residence. Formal notice has now been served to surrender the lease and he will move to alternative private accommodation,” Buckingham Palace said in a statement. “These censures are deemed necessary, notwithstanding the fact that he continues to deny the allegations against him.”
“Their majesties wish to make clear that their thoughts and utmost sympathies have been, and will remain with, the victims and survivors of any and all forms of abuse,” the message concluded.
Ferguson will also move out of Royal Lodge, where she had been living despite the duo being divorced since 1996.
Queen Camilla, Andrew, Prince William and Princess Eugenie after the Trooping the Colour ceremony in London on June 16, 2007. Getty Images
Ferguson had also come under scrutiny for her alleged close ties to Epstein. Earlier this year, she was forced to step down from a children’s charity of which she was the patron.
Andrew and Ferguson’s daughters, Princess Eugenie and Princess Beatrice, will retain their titles.
Andrew did not object to the King’s decision, and the British government also supports the move, per BBC News.
Andrew and Prince Edward, Earl of Wessex arrive to attend the Easter Matins at St George’s Chapel in Windsor, England, on April 24, 2011. Getty Images
It is said that the late queen’s son will reportedly be in “hell” moving forward.
“I think it will be pretty well a living hell for him, given his particular fondness for titles and his entitled attitude,” royal author Richard Fitzwilliams told The Guardian. “One of the troubles with him is that he has proven to be so greedy.”
