Julius Henry "Groucho" Marx (/ˈɡraʊtʃoʊ/; October 2, 1890 – August 19, 1977) was an American comedian, actor, writer, and singer who performed in films and vaudeville on television, radio, and the stage. He was a master of quick wit and is considered one of America's greatest comedians.

Marx's radio career was not as successful as his work on stage and in film, though historians such as Gerald Nachman and Michael Barson suggest that, in the case of the single-season Flywheel, Shyster, and Flywheel (1932), the failure may have been a combination of a poor time slot and the Marx Brothers' returning to Hollywood to make another film.