Waldo Brian Donlevy (February 9, 1901 – April 5, 1972), later known as
Brian Donlevy, was an Irish-American actor, noted for playing dangerous tough guys from the 1930s to the 1960s. He usually appeared in supporting roles. Among his best-known films are
Beau Geste (1939) and
The Great McGinty (1940). For his role as Sergeant Markoff in
Beau Geste he was nominated for the
Academy Award for Best Supporting Actor.