Jack Lemmon

~ as ~

Victor Clooney

Walter Matthau

~ as ~

Trabucco

Paula Prentiss

~ as ~

Celia Clooney

Klaus Kinski

~ as ~

Dr. Hugo Zuckerbrot

Dana Elcar

~ as ~

Capt. Hubris

Miles Chapin

~ as ~

Eddie, the Bellhop

Michael Ensign

~ as ~

Assistant Manager

Joan Shawlee

~ as ~

Receptionist

Fil Formicola

~ as ~

Rudy 'Disco' Gambola

C.J. Hunt

~ as ~

Kowalski