The Great Rupert

Jimmy Durante

— Mr. Louie Amendola

Terry Moore

— Rosalinda Amendola

Tom Drake

— Peter 'Pete' Dingle

Frank Orth

— Mr. Frank Dingle

Sara Haden

— Mrs. Katie Dingle

Queenie Smith

— Mrs. Amendola

Chick Chandler

— Phil Davis

Jimmy Conlin

— Joe Mahoney

Rupert

— Himself the Squirrel

Hugh Sanders

— Mulligan

Don Beddoe

— Mr. Haggerty

Frank Cady

— Mr. Taney - Tax Investigator

Candy Candido

— Molineri - Florist

Clancy Cooper

— Police Lt. Saunders

Harold Goodwin

— Callahan - F.B.I. Man

Lester Dorr

— Eddie, the Bartender (uncredited)

Kenner G. Kemp

— Passerby in Park (uncredited)

Frank Marlowe

— Dave the Mailman (uncredited)

Torben Meyer

— Mr. Petrushka the Baker (uncredited)

Ralph Montgomery

— Fireman (uncredited)

Irving Pichel

— Puzzled Pedestrian (uncredited)

Harry Strang

— Fire Chief (uncredited)