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King Charles III is worried about his son Prince Harry’s finances, according to a new book.

The monarch, 75, is reportedly concerned about what might happen once Harry, 39, spends the millions of dollars he earned from a slate of business deals that he and wife Meghan Markle did with companies like Netflix and Spotify.

The claim is just one of many salacious tidbits in royal reporter Robert Jobson’s upcoming biography about Kate Middleton, titled, “Catherine: The Princess of Wales.”

Prince Harry attends The Invictus Games Foundation 10th Anniversary Service at St Paul's Cathedral on May 8, 2024 in London, England.
Prince Harry attends The Invictus Games Foundation 10th Anniversary Service at St Paul’s Cathedral on May 8, 2024 in London, England.Getty Images
“The ‘Harry problem’, as it’s known among Palace staff, continues to plague the King,” Jobson alleges in an excerpt of his book published on Daily Mail.

“‘What worries His Majesty, and his top team,’ says a Palace official, ‘is what is going to happen when all the money runs out.’”

Britain's King Charles III talks with Britain's Prime Minister Keir Starmer (L) during the European Political Community meeting, on July 18, 2024 in Woodstock, England.
Britain’s King Charles III talks with Britain’s Prime Minister Keir Starmer (L) during the European Political Community meeting, on July 18, 2024 in Woodstock, England.Getty Images
Jobson suggests that Harry and Meghan, aka the Duke and Duchess of Sussex, are “trying to find an income stream […] that doesn’t involve dishing dirt on the Royal Family” because, in his view, “the public have wearied of their constant complaints.”

He also claims there is a “Sussex-shaped void in the Royal Family,” one which “has never loomed so large,” referring to the Royal Family’s loss of both star power and manpower that resulted from Harry and Meghan abdicating their roles as senior working royals.

Despite that “void,” Jobson writes that Prince William is “adamant” about refusing to help the Sussexes in the future.

Prince Harry, Duke of Sussex and Meghan, Duchess of Sussex attend the 2024 ESPY Awards at Dolby Theatre on July 11, 2024 in Hollywood, California.
Prince Harry, Duke of Sussex and Meghan, Duchess of Sussex attend the 2024 ESPY Awards at Dolby Theatre on July 11, 2024 in Hollywood, California.Getty Images for W+P

Prince Harry, Duke of Sussex, and Britain's Meghan, Duchess of Sussex, pose for a photo as they attend the program held in the Armed Forces Complex in Abuja, Nigeria on May 11, 2024.
Prince Harry, Duke of Sussex, and Britain’s Meghan, Duchess of Sussex, pose for a photo as they attend the program held in the Armed Forces Complex in Abuja, Nigeria on May 11, 2024.Anadolu via Getty Images
However, King Charles is a different story. “[H]e’s let it be known that he’ll never shut the door on his second child, though there seems little chance of a meaningful reconciliation for now,” the veteran royal reporter claims.

King Charles last saw Prince Harry when the latter flew to the UK in February after learning of his father’s cancer diagnosis. The pair were said to have only met briefly.

Prince Harry in London on May 8, 2024, for the 10th anniversary of the Invictus Games.
Prince Harry in London on May 8, 2024, for the 10th anniversary of the Invictus Games.Getty Images
To the surprise of many, Harry did not see his father when he visited London in May to celebrate the 10th anniversary of the Invictus Games, citing the King’s busy schedule.

“In response to the many inquiries and continued speculation on whether or not the duke will meet with his father while in the UK this week, it unfortunately will not be possible due to His Majesty’s full program,” a spokesperson for Harry told The Post at the time.

Prince Harry applauds as he takes part in an exhibition sitting volleyball match at Nigeria Unconquered, a local charity organisation that supports wounded, injured, or sick service members, in Abuja on May 11, 2024.
Prince Harry applauds as he takes part in an exhibition sitting volleyball match at Nigeria Unconquered, a local charity organisation that supports wounded, injured, or sick service members, in Abuja on May 11, 2024.AFP via Getty Images

King Charles III and Britain's Queen Camilla pose for pictures during an official visit to Guernsey, on July 16, 2024.
King Charles III and Britain’s Queen Camilla pose for pictures during an official visit to Guernsey, on July 16, 2024.POOL/AFP via Getty Images

Britain's King Charles III and Britain's Queen Camilla travel in Diamond Jubilee State Coach as they leave from Buckingham Palace in London on July 17, 2024, headed for the Houses of Parliament, for the State Opening of Parliament ceremony.
Britain’s King Charles III and Britain’s Queen Camilla travel in Diamond Jubilee State Coach as they leave from Buckingham Palace in London on July 17, 2024, headed for the Houses of Parliament, for the State Opening of Parliament ceremony.AFP via Getty Images
Charles and Harry have been at odds about finances for years. In the Sussexes’ bombshell 2021 interview with Oprah Winfrey, Harry said that his father “literally cut me off financially.” 

The prince claimed the lack of funds and the high cost of security, which he said he needed to protect his family, motivated him and Meghan to sign production deals with Netflix and Spotify that were reportedly worth $100 million and $20 million, respectively.