Wendell Armbruster, Jr.
Jack Lemmon
Pamela Piggott
Juliet Mills
Cipriani
Lino Coletta
Dr. Fleischmann
Harry Ray
Maitre D'
Guidarino Guidi
Barman
Giacomo Rizzo
Concierge (as Antonino Faa' Di Bruno)
Antonino Faà di Bruno
Nurse (as Yanti Sommer)
Yanti Somer
Nurse
Janet Ågren
Hostess
María Rosa Sclauzero
Hostess (as Melu' Valente)
Melù Valente
Rossi
Aldo Rendine
Carlo Carlucci
Clive Revill
Man at Airport (uncredited)
Bruno Alias
Singer Sergio Bruni (uncredited)
Sergio Bruni
Police commissioner (uncredited)
Pasquale Campagnola
Male Nurse (uncredited)
Nestore Cavaricci
Enrico Cesaretti
Alberto Trotta (uncredited)
Armando De Martino
Waiter (uncredited)
Giorgio Dolfin
Hotel Guest (uncredited)
Andrea Esterhazy
Man at Aiport (uncredited)
Ferruccio Fregonese
Airplane Passenger (uncredited)
Ettore Geri
J.J. Blodgett
Edward Andrews
Baron Von Schmetterling (uncredited)
Armando Giovagnoli
Helicopter Pilot (uncredited)
Ty Hardin
Margherita Horowitz
Silvio Klein
Woman at Airport (uncredited)
Alba Maiolini
Commissionaire (uncredited)
Giuseppe Marrocco
Woman at Hotel (uncredited)
Anna Maria Perego
Sommelier (uncredited)
Luigi Scavran
Airline Passenger (uncredited)
Pupita Lea Scuderoni
Maria Tedeschi
Bruno
Gianfranco Barra
Giuseppe Terranova
Police Escort (uncredited)
Bruno Tocci
Sandra Wolff
Lidia Zanussi
Policeman (uncredited)
Gianni Di Segni
Arnoldo Trotta
Franco Angrisano
Mattarazzo
Pippo Franco
Armando Trotta
Franco Acampora
Anna
Giselda Castrini
Passport Officer
Raffaele Mottola
Screenplay
I. A. L. Diamond
Director
Billy Wilder
Producer
Executive Producer
Editor
Ralph E. Winters
Original Music Composer
Carlo Rustichelli
Theatre Play
Samuel A. Taylor
Director of Photography
Luigi Kuveiller
Art Direction
Ferdinando Scarfiotti