Charles took part in 372 public engagements last year, even after stepping aside for almost three months because of cancer treatment, according to data compiled by The Times of London newspaper. That made him the second-busiest royal behind his sister, Princes Anne, who had 474 engagements.

After a turbulent year for the royal family, it was confirmed in December 2024 that Charles would be continuing his cancer treatments. In March 2025, it was announced that the king was briefly hospitalized but was recovering at home. Keep scrolling for a timeline of Charles’ cancer battle:

King Charles III was briefly hospitalized Thursday amid ongoing medical treatment for cancer, according to Buckingham Palace. Charles' hospitalization was a result of "temporary side effects" he experienced after undergoing what the palace described as "scheduled and ongoing medical treatment for cancer" on Thursday morning.