King Charles III and Kate Middleton both announced this year they have cancer. Middleton revealed in September that she completed chemotherapy treatment.

In his Christmas address, King Charles III spoke to the "uncertainties of illness" after both he and Kate Middleton were diagnosed with cancer in 2024.

George, 11, Charlotte, 9, and Louis, 6, walked alongside their parents Prince William and Kate, the Princess of Wales, as members of Britain's royal family made their way into St. Mary Magdalene Church for their traditional Christmas Day service.

King Charles III was diagnosed with cancer this year after treating an enlarged prostate. His daughter-in-law, Kate Middleton, completed chemotherapy in September.

Kate Middleton hosted her fourth annual Christmas carol service at Westminster Abbey. As in previous years, the service will air on Christmas Eve in the UK; this year's broadcast will feature a personal introduction from the Princess of Wales herself.

King Charles thanked the medics who cared for him and Princess Kate, after they both underwent treatment for cancer this year, in a Christmas message.

After a tough year for the royal family, King Charles and Kate Middleton’s health issues were top of mind as the monarch gave his annual Christmas speech on December 25. On Wednesday, Charles departed from 18 years of tradition as he addressed the nation at a former hospital chapel instead of a crown residence–a seeming shout-out to the health care community after he and Kate were diagnosed with cancer earlier this year.

The monarch and daughter-in-law Kate Middleton were diagnosed with cancer just weeks apart, removing two senior royals from frontline duties.