George Segal as Robby Ross

Jacqueline Bisset as Natasha O'Brien

Robert Morley as Maximilian Van Devere

Jean-Pierre Cassel as Louis Kohner

Philippe Noiret as Jean-Claude Moulineau

Jean Rochefort as August Grandvilliers

Gigi Proietti as Ravello

Stefano Satta Flores as Fausto Zoppi

Madge Ryan as Beecham

Frank Windsor as Blodgett

Peter Sallis as St. Claire

Tim Barlow as Doyle

John Le Mesurier as Dr. Deere

Joss Ackland as Cantrell

Jean Gaven as Salpetre

Daniel Emilfork as Saint-Juste

Jacques Marin as Massenet

Jacques Balutin as Chappemain

Jean Parédès as Brissac

Michael Chow as Soong

Anita Graham as Blonde

Nicholas Ball as Skeffington

David Cook as Bussingbill

Nigel Havers as Counterman

John Carlisle as Actor

Sheila Ruskin as Actress

Kenneth Fortescue as Director

Struan Rodger as Asst. Director

Derek Smith as Man In Corridor

Marjorie Smith as TV Receptionist

Aimée Delamain as Old Woman

Lyall Jones as Robby's Driver

Eddie Tagoe as Mumbala

Caroline Langrishe as Loretta

Jill Goldston as Restaurant Patron (uncredited)

Sylvia Kay as Reporter (uncredited)

Ronald Leigh-Hunt as Priest marrying Bobby and Natasha (uncredited)

Steven Meek as Hotel Guest (uncredited)