Prince Charles was publicly humiliated this week when a renowned royal biographer accused him of being “atrociously hypocritical and entitled,” adding that he looks older than his 94 year-old mother, Queen Elizabeth.

This attack was made by Clive Irving, author of the new biography “The Last Queen,” who went so far as to say that there’s a risk that “the monarchy will go over a cliff very fast” if Charles succeeds the Queen. Irving spoke to Vanity Fair about one of the more “serious problems” that he sees with Charles.

“One problem is that he doesn’t look like an invigorating generational shift, does he? That’s what would be needed, something that reinvigorates and sends a sense that they’ve understood the modern world,” Irving said. “In some ways, Charles looks older than the queen….that’s his deliberate and chosen style, like a younger brother of the queen rather than a son.”

Irving also feels that Charles style of living his life solo, away from the royal family is indicative of how the 72 year-old would be on the throne.

“He pulls in groups of advisers he targets for his issues and invariably they’re sycophants,” the royal biographer claimed. “He doesn’t like to be challenged, and he thinks like an autocrat. And he’s shown himself to be a hypocrite. He’s born with such a sense of entitlement that it’s never occurred to him that maybe you can’t continue to do that.”

Irving went on to say that an example of this “atrocious act of hypocrisy” is something involving Prince Harry and Meghan Markle, saying that Charles had taken the view that they should not use the Sussex Royal brand to monetize on the royal name. However, Irving pointed out that Charles was one of the first royals to do exactly that with his Waitrose Duchy Organic” food brand, which is supplied to upmarket supermarkets Waitrose and Ocado. Charles founded this expensive brand as Duchy Organics 35 years ago, and he continues to his organic farm on the Sandringham estate to this day.

Irving had previously said that the Queen “will likely be the last female monarch in England,” pointing out the fact that all Her Majesty’s immediate successors are male.

“She’s one of three outstanding figures in history who were Queens,” Irving said. “It’s a very emotional idea, I think. The whole history of queens in England will end with this one.”