Royal biographer Tom Bower has claimed Meghan Markle is set to follow in the footsteps of Prince Harry and publish a tell-all book.

Bower, who wrote Revenge: Meghan and Harry and the War Between the Windsors, revealed to GBNews: "My information is that she is writing her memoirs, and it will be a huge money-spinner."

While it's unclear how much Meghan could bank from a book deal, Prince Harry earned a rumoured $20 million (£16m) for his bombshell memoir, Spare.

Meghan has yet to comment on the reports, so we'll have to watch this space. In the meantime, read on to discover other ways the royal couple makes and spends their millions.