Was in no way trained as a singer, but was made to sing briefly in Singin' in the Rain (1952).
An extremely prolific theatrical actor, he appeared on Broadway from 1925-1948, notably in one of its most important flops, "Penny Arcade", which led to its stars James Cagney and Joan Blondell being signed by Warner Brothers.
Daughters Mary Ellis and Margaret.
For his work in My Six Convicts (1952), he was the first of only 7 actors to win the Golden Globe for Best Supporting Actor in a motion picture without receiving an Oscar nomination for the same performance. The other 6 are, in chronological order: Earl Holliman in The Rainmaker (1956), Stephen Boyd in Ben-Hur (1959), Oskar Werner in The Spy Who Came in from the Cold (1965), Richard Attenborough, The Sand Pebbles (1966) and Doctor Dolittle (1967), Richard Benjamin in The Sunshine Boys (1975) and Aaron Taylor-Johnson in Nocturnal Animals (2016).
Father: Millard Fillmore Mitchell; Mother: Elizabeth Bessie Anna Fleming.
He has five films that have been selected for the National Film Registry by the Library of Congress as being "culturally, historically or aesthetically" significant: Twelve O'Clock High (1949), Winchester '73 (1950), The Day the Earth Stood Still (1951), Singin' in the Rain (1952) and The Naked Spur (1953).