This false claim emerged from conspiracy theorists on Twitter and has rapidly spread, trending for nearly 24 hours. It is falsely suggested that King Charles has died, fueled by speculation around a major announcement from Buckingham Palace to the BBC. Additionally, there are baseless rumors circulating about the well-being of Kate Middleton, which have also been debunked. King Charles has indeed been diagnosed with cancer, but reputable sources confirm it is treatable. His last public appearance was less than a week ago, on March 13th. Multiple reliable news outlets have addressed and refuted these unfounded claims:
Newsweek reports on the viral nature of the false claims: Newsweek - King Charles Dead Conspiracy Theory Twitter Viral
The Hill covers how UK embassies have responded to and refuted the conspiracy theories: The Hill - UK Embassies Shoot Down King Charles III Conspiracy Theories
People Magazine shares a recent photo of King Charles, countering the rumors, and confirms his ongoing treatment for cancer: People - King Charles Seen in New Photo at Buckingham Palace Meeting for Cancer Treatment