Irish actor of stage and screen who became known as much for his offstage indulgences as for his flamboyant performances.

The son of a miller, Harris studied at the London Academy of Music and Dramatic Art and made his stage debut in 1956. His first film was Shake Hands with the Devil (1959), which was followed by noted supporting performances in The Guns of Navarone (1961) and Mutiny on the Bounty (1962). He became an international star with his Oscar-nominated portrayal of a brutal, self-centred rugby player in This Sporting Life (1963), a performance still regarded by many as Harris's finest. The film revealed Harris to be an actor who excelled at excess, a talent for which he was praised when playing roles that called for flamboyance—and for which he was derided as a “ham” when playing roles that required subtlety.

Harris had continued success in the 1960s with films such as Red Desert (1964), Major Dundee (1965), and Hawaii (1966). His role as King Arthur in the film version of Alan Jay Lerner (Lerner, Alan Jay) and Frederick Loewe (Loewe, Frederick)'s Broadway hit Camelot (1967) was one with which he was permanently associated and one that he often recreated. Camelot also revealed that Harris had a pleasant singing voice, which led to a recording career that included the critically praised album A Tramp Shining (1968), as well as the song "MacArthur Park," which became an international hit.

Harris's notable films in the next few years included The Molly Maguires (1970), A Man Called Horse (1970), and the television film The Snow Goose (1971). By this time Harris's appetites for alcohol and drugs had damaged his health and his career, and he accepted mostly supporting roles in minor films throughout the 1970s and '80s. After a period of rehabilitation—during which he swore off drinking, discovered religion, and wrote poetry and short stories—Harris returned to form in the 1990s, beginning the decade with one of the best performances of his career in The Field (1990), for which he received another Oscar nomination. Other films such as Unforgiven (1992), Patriot Games (1992), Cry, the Beloved Country (1995), Gladiator (2000), and Harry Potter and the Sorcerer's Stone (2001; also released as Harry Potter and the Philosopher's Stone) earned Harris a newfound reputation as an engaging character actor.

Harris, who lived by his own dictum that “life should be lived to the last drop and then some,” was also a celebrated raconteur, appearing often on late night talk shows with hilarious tales of his hedonistic past.