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)