Doctor Rhythm

Bing Crosby

Dr. Bill Remsen

Mary Carlisle

Judy Marlowe

Beatrice Lillie

Mrs. Lorelei Dodge-Blodgett

Andy Devine

Officer Lawrence O'Roon

Rufe Davis

Al (Zookeeper)

Laura Hope Crews

Mrs. Minerva Twombling

Fred Keating

Chris LeRoy

John Hamilton

Insp. Bryce

Sterling Holloway

Luke (Ice-Cream Man)

Henry Wadsworth

Otis Eaton (The Drunk)

Franklin Pangborn

Mr. Stenchfield (Store Clerk)

Harold Minjir

Mr. Coldwater

William Austin

Mr. Martingale

Gino Corrado

Cazzatta

Harry Stubbs

Police Captain

Frank Elliott

Lorelei's Butler

Charles R. Moore

Tooter, the Chauffeur

Louis Armstrong

Trumpet Player

Charlene Arnold

Dancer (uncredited)

Joanne Arnold

Dancer (uncredited)

Dolores Casey

Nurse (uncredited)

Desmond Gallagher

Stage Manager (uncredited)

Alphonse Martell

Marvelous Marko (uncredited)

Allen Mathews

LeRoy's Henchman (uncredited)