Prince Andrew’s ‘nasty remarks’ about Kate Middleton caused feud with Prince William: author

Prince Andrew’s alleged “nasty” comments about Kate Middleton sparked his ongoing feud with his nephew, Prince William, according to a royal biographer.

The disgraced Duke of York, 65, has been estranged from both Prince William and Harry for years — with recent reports suggesting that the Prince of Wales, 43, sees his uncle as a “problem.”

Andrew made several “rude” and “unkind” remarks about the Princess of Wales, according to prominent royal author Andrew Lownie, who details “Entitled: The Rise and Fall of the House of York.”

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Lownie added that the alleged remarks came from a place of jealousy, as the duke was envious that Catherine had become a key figure of the Firm following the death of Queen Elizabeth II.

The alleged comments had resulted in the breakdown of his relationship with the future king, Lownie claims.

“I can’t see how anyone could make unkind comments about Kate when she’s been the family’s saving grace,” Lownie told Radar Online.

“It surprised me, but people do get jealous,” he added. “I’d have thought Prince Andrew would respect William as future king though” than to be “nasty about his wife.”

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It’s not known exactly what was said about the future queen; however, Lownie suggested that the remarks prompted William to turn his back on his scandal-scarred uncle.

What’s more, he added that William had grown increasingly frustrated with his uncle over the past few years.

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“William has a very strong sense of public duty and is doing his best to keep the show on the road,” Lownie said. “He’s all about doing things the right way and has enough on his plate without having to think about his uncle.”

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“Everyone is pulling together — Charles, Anne, Edward, William and others — but the whole side has been let down by Prince Andrew,” he added.

Indeed, Andrew’s fate within the monarchy had been reportedly decided by William already.

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Insiders claimed that the duke alleged Chinese spy Yang Tengbo.

Additionally, Lownie spoke to sources that suggested William will be eager to evict Andrew and his ex-wife, Sarah Ferguson, from the Royal Lodge, where the pair have lived since 2004.

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“He [William] also loathes Sarah, Andrew’s ex-wife, and can’t wait for the day when his father throws them both out,” a source is quoted in the book.

“If Charles doesn’t, I guarantee you the first thing William does when he eventually becomes king is to get them evicted.”

The Post has reached out to Kensington Palace and Andrew’s reps for comment.