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
In March 2020, Prince William became Patron of London’s Air Ambulance Charity after supporting their 30th Anniversary Campaign. William previously worked as an air ambulance pilot for the East Anglia Air Ambulance from 2015-17.
The Prince and Princess of Wales joked about their famous friend dropping in at the charitable event with a post shared on X, formerly Twitter: "Fancy seeing you here, @TomCruise!"
In another post, they wrote, "Celebrating the heroes of the @LDNairamb. Their speed, expertise and unwavering dedication makes the city safer."
Earlier in the morning, the Prince of Wales returned to work for the first time since his father's cancer diagnosis was revealed. It was also the first royal appearance for Prince William since his wife Kate Middleton's planned abdominal surgery.
William hosted an investiture ceremony at Windsor Castle, which acknowledged exceptional achievements through six orders of chivalry, and two orders of merit. Recipients are made officers of the Most Excellent Order of the British Empire or officer of the Order of the British Empire.
LIKE WHAT YOU’RE READING? CLICK HERE FOR MORE ENTERTAINMENT NEWS
Patricia Spruce, a nurse who was awarded an MBE, shared her experiences from the event, which included a conversation with the Prince of Wales.
"Prince William said that Katherine had two Filipino nurses looking after her and they were amazing and kind," Spruce wrote on LinkedIn.
On Monday, Buckingham Palace confirmed a "separate issue of concern" was identified during King Charles' recent "benign prostate enlargement" procedure at the London Clinic. "Subsequent diagnostic tests have identified a form of cancer," the palace said in a statement.
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.
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.
The Duke of Sussex flew into town from California to visit his father on Tuesday, and left the country the following day.
One day prior to announcing his cancer diagnosis, the king made his first public appearance since receiving treatment for an enlarged prostate. The British monarch waved to well-wishers outside of St. Mary Magdalene Church near Sandringham with his wife, Queen Camilla.
On Jan. 17, King Charles III was scheduled to have a "corrective procedure" for his enlarged prostate. The palace later announced that the surgery had been a success. "His Majesty is doing quite well," a royal source told Fox News Digital.
CLICK HERE TO SIGN UP FOR THE ENTERTAINMENT NEWSLETTER
Last week, Kate returned home after a nearly two-week stay in a hospital for abdominal surgery.
Kensington Palace shared the news in a statement obtained by Fox News Digital, adding that the Princess of Wales is "making good progress."
"The Prince and Princess wish to say a huge thank you to the entire team at The London Clinic, especially the dedicated nursing staff, for the care they have provided," the statement read. "The Wales family continues to be grateful for the well wishes they have received from around the world."
On the recommendation of her doctors, the princess will not resume her public duties until Easter, palace officials said.