King Charles has been diagnosed with a form of cancer, says Buckingham Palace.
The type of cancer has not been revealed – it is not prostate cancer, but was discovered during his recent treatment for an enlarged prostate.
The King began “regular treatments” on Monday and will postpone public duties during it, the Palace said.
The Monarch, 75, “remains wholly positive about his treatment and looks forward to returning to full public duty as soon as possible,” it added.
No further details are being shared on the stage of cancer or a prognosis.
Charles informed both his sons personally about his diagnosis and the Prince of Wales was said to be in regular contact with his father.
The Duke of Sussex, Prince Harry, who lives in the United States, spoke to his father and will be travelling to the UK to see him in the coming days.