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