The son of actor Jack Holt and brother of actors David and Jennifer Holt, Tim Holt, born Charles John Holt III, debuted onscreen at age ten (playing his father's character as a child) in The Vanishing Pioneer (1928). He went on to play earnest teenagers in the mid-to-late '30s, moving into roles as boyish Western heroes in many B-movies; from 1941-43 and 1948-52 he was a top ten box office star, and at one point was very popular among teenage girls. He occasionally got higher quality roles, and will probably be best remembered as the arrogant aristocrat George Amberson in Orson Welles' The Magnificent Ambersons (1942) and as Curtin, Humphrey Bogart's conscientious partner, in John Huston's The Treasure of the Sierra Madre (1948). During World War II, he was an oft-decorated B-29 bomber in the Pacific arena. He was rarely onscreen after 1952, and he retired from acting in the mid-50s to go into business; later he did occasional radio and TV work. He died of cancer in 1973.