Alan Mason Dinehart, Sr., was an American actor, director, writer, and stage manager. He became a character actor and supporting player in at least eighty-eight films between 1931 and 1944. Earlier, he appeared in more than twenty Broadway plays.
He left school to appear on stage with a repertory company and had no screen experience when he signed a contract with Fox in May 1931.
Dinehart's likeness was drawn in caricature by Alex Gard for Sardi's, the New York City theater district restaurant. The picture is now part of the collection of the New York Public Library.
Dinehart's first wife was the stage actress Louise Dyer, a native of Nassau County, New York. They were divorced in 1932. In 1933, Dinehart married the film actress Mozelle Britton, a native of Oklahoma City, Oklahoma. They are entombed together at Forest Lawn Memorial Park in Glendale, California.
Dinehart had two sons: from the first marriage, Alan Dinehart, Jr., and from the second marriage, Mason Alan Dinehart, aka Alan Dinehart, III, born in Los Angeles in 1936.