Richard St John Harris was an Irish actor, singer, songwriter, producer, director and writer. He appeared on stage and in many films, appearing as Frank Machin in This Sporting Life, and King Arthur in the 1967 film Camelot and the subsequent 1981 revival of the show. He played an aristocrat and prisoner in A Man Called Horse, a gunfighter in Clint Eastwood's Western film Unforgiven, Emperor Marcus Aurelius in Gladiator, and Albus Dumbledore in the first two Harry Potter films: The Philosopher's Stone and the Chamber of Secrets. Harris had a top ten hit in the United Kingdom and United States with his 1968 recording of Jimmy Webb's song "MacArthur Park".

https://en.wikipedia.org/wiki/Richard_Harris