Prince Harry visited the UK on Tuesday following King Charles' cancer diagnosis
King Charles' cancer diagnosis brings Harry back to UK as announcement rocks royals
Historian and author Gareth Russell reacts to Harry visiting King Charles after cancer diagnosis and what it means for the Royal Family on 'The Story with Martha MacCallum.'
Prince William expressed gratitude for the outpouring of sympathy for his family following King Charles' cancer diagnosis.
The Prince of Wales was joined by Tom Cruise, a longtime friend of the monarchy, at London's Air Ambulance Charity, where Prince William said he "really appreciates everyone's kindness" following King Charles' diagnosis.
King Charles III was diagnosed with a form of cancer and is undergoing treatment, Buckingham Palace announced Monday.
KING CHARLES DIAGNOSED WITH CANCER, BUCKINGHAM PALACE SAYS
Tom Cruise and Prince William attend Londons Air Ambulance Charity event. (Daniel Leal)
"During The King’s recent hospital procedure for benign prostate enlargement, a separate issue of concern was noted," Buckingham Palace said in a statement. "Subsequent diagnostic tests have identified a form of cancer."
King Charles was "advised by doctors to postpone public-facing duties" while undergoing a series of "regular treatments," a statement from the palace said. It's unclear what cancer diagnosis His Majesty received.
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In addition to Prince Harry and Prince William, the monarch reportedly advised his siblings – Prince Andrew, Princess Anne and Prince Edward – about his diagnosis prior to the public revelation, according to People magazine.
This is a developing story. Check back here for updates.
Tracy Wright is an entertainment reporter for Fox News Digital. Send story tips to
