King Charles’ cancer is incurable, a bombshell report has claimed.

The 76-year-old monarch is likely to die “with” and not “of” cancer.

The report confirms what many suspected — Charles’ cancer is treatable but not curable, which is the case for many older individuals battling the disease, renowned royal correspondent and the editor of the UK Daily Telegraph, Camilla Tominey, reported.

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The palace is unlikely to welcome the report, according to the Daily Beast, as it reignites rumours about the King’s fragile health.

Speculation over his condition intensified after Prince Harry told the BBC he didn’t know how much longer his father had to live.

While royal aides have consistently assured reporters that Charles is responding well to cancer treatment, the report claims that the King would never move into Buckingham Palace due to his declining health.

“The talk now is that he may die ‘with’ cancer, but not ‘of’ cancer following a rigorous treatment program,” Ms Tominey wrote.

With the King’s ongoing cancer treatment, there will also be major changes at this year’s Trooping the Colour, which is taking place on June 14.

Charles has ridden in the parade for years, both for his late mother’s official birthday celebrations and for his own.

However, this year, he will instead travel in a carriage in the procession from Buckingham Palace to the Horse Guards Parade and back, according to the Daily Mirror.

Plans for Charles’ 80th birthday in 2028 are still progressing, signalling the palace’s confidence in the King’s long-term reign.

Ms Tominey also claimed a reunion between Charles and Harry could be on the cards at the Invictus Games in Birmingham in 2027, with palace aides eyeing the event as a possible turning point in their fractured relationship.

Officials are hopeful that any reconciliation would also involve Harry’s children, Prince Archie and Princess Lilibet, who Charles hasn’t seen since 2022.

Harry has previously said he cannot bring his family to the UK safely without necessary security measures.