“The Mickey Mouse Theater of the Air” was a musical-variety radio series for children, sponsored by Pepsodent and broadcast on NBC from the Disney Little Theater on the RKO lot from January 2 to May 15, 1938. It was created to help promote the release of Snow White and the Seven Dwarfs.
Music for the program was provided by the Felix Mills Orchestra, Donald Duck’s Swing Band, and The Minnie Mouse Woodland Choir. The opening theme was “Who’s Afraid of the Big Bad Wolf?”. John Hiestan was the announcer for this Sunday afternoon show, and it featured regular Disney characters like Mickey Mouse (Walt Disney for the first four episodes), Donald Duck (Clarence Nash), Minnie Mouse (Thelma Boardman), Goofy (Stuart Buchanan), and Clarabelle Cow (Florence Gill).
The Mickey Mouse Theater of the Air [@] The Internet Archive