Sonny Bupp (January 10, 1928 – November 1, 2007) was an American child film actor and businessman. He was the brother of actors Tommy Bupp (1924-1983), June Bupp (1913-1989) and Ann Bupp (b. 1922). Born as Moyer MacClaren Bupp in New York City, he appeared in over 60 films during his career, including two Our Gang comedies, 1935's Our Gang Follies of 1936 and 1938's Men in Fright.
He appeared in Citizen Kane and was the last surviving cast member of that film. He also appeared in the 1937 Three Stooges' Cash and Carry, as well as such films as Love is in the Air (Ronald Reagan's first film), The Renegade Trail, Annie Oakley (with Barbara Stanwyck), Kid Millions, Lost Horizon (with Ronald Colman), Angels With Dirty Faces, Tennessee Johnson and The Devil and Daniel Webster.
He served in the U.S. Army during World War II and, after his film career ended, became an auto industry executive. He died in Henderson, Nevada, aged 79, from undisclosed causes.