Lewis J. Stadlen

Efram

Ralph Masius

Dr. Maurice Samuels

Lewis J. Stadlen / Max Bialystock

Banjo

Dr. Ira Fried

Dr. Freid

Dr. Ira Freid

Bandleader

Ed Kenrow

Lekish / Zeinvel / The Peddler (voice)

Moderator

Eli Schwab

Jay Blake

Norman Wagstaff (uncredited)

Mr. Cooper

Danny

Marty

Lupinsky

Dr. Gruber

Allan's Father

John Taylor

Stanley

Sam Liebowitz

Efram

Berman

Potofski

Julian Branch, a Song Writer (as Lewis Stadlen)

Mandel (as Lewis Stadlen)