Elsewhere, Meghan is described as “deluded” to think of herself as being of a higher social class than the Beckhams, with Mr Bower claiming she was “irritated” when she discovered they were richer than her.

He writes: “In Meghan’s celebrity world, ranking depended on wealth and fame. As a seasoned operator, Meghan deluded herself that her status in the Royal Family placed her above Victoria in the social pecking order.

“She was irritated to discover that the Beckhams had considerably more wealth than herself.

“They owned five homes, had constant access to private jets, invitations to sail on yachts and much more money. And she was soon to be a duchess.”

The book also claims Meghan’s friendship with Victoria started withering in 2017 over leaks to the press.

Mr Bower alleges that when Meghan met David Beckham’s wife, they initially became good friends – with the Spice Girl even offering beauty advice to Meghan, who was then the Duke’s fiance.

But according to the book, a report by The Sun about their “growing friendship” was enough to cause the first cracks in their relationship. Meghan was allegedly “furious” over the article amid the UK media’s ongoing probing into her life.