Freddie Trimball
Dodie Rogers
Roy Donne
Lee Watson
Betty Rogers
Phineas Wharton, Sr. / Phineas Wharton, Jr.
Singer
Alvin, Peabody's Nephew
Mr. Peabody
College-Dean McKinley (as Monte F. Collins)
Policeman
Murphy
Miss Palmer
Breezie of The Harmonica Boys
Eddie of The Harmonica Boys
Joe of The Harmonica Boys
Johnny of The Harmonica Boys
Harmonica Group
Orchestra (as Gene Kupa's Orchestra)
Gene Krupa
Butch (as Henry 'Butch' Stone)