Nick Johnson
Tony Curtis
Francesca di Rienzi
Rosanna Schiaffino
American Brasshat
Alan Gifford
German Brasshat
Joseph Fürst
Butler
Monti DeLyle
French Inspector
Bernard Spear
Italian Dressmaker
Eileen Way
Head Waiter
Bruno Barnabe
Gypsy Baron
Gábor Baraker
Baby's Boyfriend
Tony Baron
Matron
Eunice Black
Radio Engineer
John Brandon
Parker
Lionel Jeffries
Windsor Davies
Romano
Franco De Rosa
Boy in Orphanage
John Fordyce
First Maid
Yole Marinelli
Second Maid
Miki Iveria
Priest
Henri Vidon
Photographer
Raymond Young
Dancer
Jacqueline Bisset
Boy in Orphanage (uncredited)
Michael Des Barres
Gigi
Zsa Zsa Gabor
Baby
Nancy Kwan
Fenella
Fenella Fielding
Aunt Miriam
Anna Quayle
Conte de Rienz / Maximillian
Warren Mitchell
Romeo
Mischa Auer
Capt. Daniel O'Flannery
Noel Purcell
Producer
Ray Stark
Director
Ken Hughes
Screenplay
Story
Music
Dennis Farnon
Ronald Harwood
Editor
John Shirley
Casting
Maude Spector
Director of Photography
Denys N. Coop
Novel
Richard Deeming