Ian McShane as Charlie Cartwright

Suzanne Pleshette as Sam Perkins

Vittorio De Sica as Shoemaker

Murray Hamilton as Fred Ferguson

Sandy Baron as John Marino

Mario Carotenuto as Giuseppe

Paul Esser as German Sergeant

Suzy Falk as German Sergeant's Wife

Michael Constantine as Jack Harmon

Pamela Britton as Feda

Norman Fell as Harve Blakely

Reva Rose as Irma Blakely

Hilarie Thompson as Shelly Ferguson

Luke Halpin as Bo

Donovan as Singer in Youth Hostel

Marty Ingels as Bert Greenfield

Catherine Spaak as Woman Posing for Photographer

Mildred Natwick as Jenny Grant

Peggy Cass as Edna Ferguson

Senta Berger as London Saleswoman

Joan Collins as Girl on Sidewalk

Marina Berti as Gina

Robert Vaughn as Antonio, Photographer

John Cassavetes as Steve

Ben Gazzara as Card Player

Patricia Routledge as Mrs. Featherstone

Ermelinda De Felice as Italian Woman in Automobile Accident

Anita Ekberg as Performer

Elsa Martinelli as Maria, Woman on Venetian Bridge

Virna Lisi as John's Beautiful Cousin in Rome

Aubrey Morris as Harry Dix

Jennifer White as Dot

Carol Cleveland as Travel Agent

Sonya Doumen as Miss Belgium

Roger Six as Marcel

Frank Latimore as George

Yutte Stensgaard as Museum Guide