Peter Sellers

Dr. Albert T. Hopfnegal

Jo Ann Pflug

Alice Gilligan

Rick Lenz

Lester Hammond

Harold Gould

Dr. Herman Zerny

Eve Bruce

Nurse Lamarr

J. Edward McKinley

George Leffingwell, Hospital Commissioner

Hope Summers

Nurse Throttle

Pat Morita

Harry Nishimoto

Brett Halsey

Dr. Paolo Quagliomo

Kathleen Freeman

Mrs. Manzzini

Norman Alden

Katzen

William Elliott

Oscar

Uschi Digard

Girl at Party (uncredited)