Doctor Rhythm

Bing Crosby

as Dr. Bill Remsen

Mary Carlisle

as Judy Marlowe

Beatrice Lillie

as Mrs. Lorelei Dodge-Blodgett

Andy Devine

as Officer Lawrence O'Roon

Rufe Davis

as Al (Zookeeper)

Laura Hope Crews

as Mrs. Minerva Twombling

Fred Keating

as Chris LeRoy

John Hamilton

as Insp. Bryce

Sterling Holloway

as Luke (Ice-Cream Man)

Henry Wadsworth

as Otis Eaton (The Drunk)

Franklin Pangborn

as Mr. Stenchfield (Store Clerk)

Harold Minjir

as Mr. Coldwater

William Austin

as Mr. Martingale

Gino Corrado

as Cazzatta

Harry Stubbs

as Police Captain

Frank Elliott

as Lorelei's Butler

Charles R. Moore

as Tooter, the Chauffeur

Louis Armstrong

as Trumpet Player

Charlene Arnold

as Dancer (uncredited)

Joanne Arnold

as Dancer (uncredited)

Dolores Casey

as Nurse (uncredited)

Desmond Gallagher

as Stage Manager (uncredited)

Alphonse Martell

as Marvelous Marko (uncredited)

Allen Mathews

as LeRoy's Henchman (uncredited)

Gretchen McCarthy

as Dancer (uncredited)

Emory Parnell

as Sgt. Olson (uncredited)

Robert Taylor

as Band Member (uncredited)