Malcolm St. Clair (May 17, 1897 – June 1, 1952) was a Hollywood film director, writer, producer and actor, he was sometimes credited as Mal St Clair. A disciple of Mack Sennett, St. Clair was an actor in many films primarily comedies. At 6'7" he can be seen in such Sennett films as Yankee Doodle in Berlin, towering over the other actors, playing Crown Prince Wilhelm. He later moved on to director and directed almost 100 films, as well as producing five others, between 1915 and 1948. His brother, Eric St Clair, was a writer and actor. He directed most of Laurel and Hardy's later films at 20th Century Fox.
He worked on many films, including Lighthouse by the Sea (1924), The Big Noise (1944), Two Weeks to Live (1943), The Dancing Masters (1943), Sun Valley Serenade (1941), Young As You Feel (1940), Hollywood Cavalcade (1939), Goldie Gets Along (1933), Olsen's Big Moment (1933), Montana Moon (1930), Side Street (1929), The Canary Murder Case (1929), A Social Celebrity (1926), the now-lost Gentlemen Prefer Blondes (1928), The Show Off (1926), The Grand Duchess and the Waiter (1926), Are Parents People? (1925), A Woman of the World (1925), Christmas (1922), The Blacksmith (1922), The Goat (1921), The Little Widow (1919), His Baby Doll (1917) and The Camera Cure (1917).
In 1950 after a brief retirement, he was to attempt a comeback into films, but due to ill health he retired permanently from films.
He died at age 55 and was interred at Mountain View Cemetery and Mausoleum in Altadena, California.