Prince Harry says King Charles was concerned Meghan Markle would take the limelight from him and Camilla in his upcoming memoir

• The Telegraph published details from Prince Harry's upcoming memoir, "Spare," on Saturday.
• Harry wrote that King Charles III didn't want to financially support Meghan Markle and was jealous of her.

Prince Harry says his father didn't want to financially support Meghan Markle, fearing she'd steal the royal spotlight from him as the late Princess Diana did.

The Telegraph published details from the Duke of Sussex's upcoming memoir, "Spare," on Saturday ahead of its January 10 release. A conversation between Harry and King Charles III sparked during a trip to Sandringham Estate, where Harry would ask the late Queen Elizabeth II for permission to marry Markle, according to the outlet.

Harry wrote that while driving with his father to Sandringham Estate, Charles questioned whether Markle would continue to work as an actress, to which he responded that Markle would likely quit acting and join him in the UK.

"Well, my dear son, you already know that we don't have money to spare," Harry wrote, according to the outlet, adding that King Charles claimed he was already struggling to support Prince William and Kate Middleton.

Although Prince Harry didn't verbally respond, he addressed the comment in his memoir, according to The Telegraph. Harry wrote that Charles argued the lack of funds was par for the course, as their jobs as royals meant they lived in a "gilded cage" and gave up freedom in exchange for "food and clothing."

In the memoir, Harry wondered how Charles could say the family's "captivity was costing him too much money" while also making "millions from the tremendously lucrative" Duchy of Cornwall, The Telegraph reports. The Duchy of Cornwall is a suite of properties owned by the British royal family.

Instead, Harry speculated in the memoir that his father's motivations were actually driven by jealousy for Markle's rising star. Harry wrote that Charles had already experienced being outshined as a royal by Princess Diana and could not deal with "a novel and resplendent" figure who may take the attention away from him and his wife, Camilla, Queen Consort.

"He had experienced that before and he had no interest in letting it happen to him again," Harry wrote, according to The Telegraph.

Representatives for Buckingham Palace did not immediately respond to Insider's request for comment.

Charles did financially support the Sussexes during the early stages of their marriage, but Harry revealed in his 2021 interview with Oprah that they were cut off after stepping back as senior royals in 2020.

"I've got all my mum left me," Harry told Winfrey at the time. "And without that, we would not have been able to do this. She saw it coming, and I certainly felt her presence throughout this whole process."

A number of Harry's claims have made headlines recently as his memoir's debut nears, including that Prince William attacked him during an argument about Markle.

"He grabbed me by the collar, ripping my necklace, and he knocked me to the floor. I landed on the dog's bowl, which cracked under my back, the pieces cutting into me," Harry wrote. "I lay there for a moment, dazed, then got to my feet and told him to get out."