Tony Curtis

Nick Johnson

Rosanna Schiaffino

Francesca di Rienzi

Lionel Jeffries

Parker

Zsa Zsa Gabor

Gigi

Nancy Kwan

Baby

Fenella Fielding

Fenella

Anna Quayle

Aunt Miriam

Warren Mitchell

Conte de Rienz / Maximillian

Mischa Auer

Romeo

Noel Purcell

Capt. Daniel O'Flannery

Alan Gifford

American Brasshat

Joseph Fürst

German Brasshat

Monti DeLyle

Butler

Bernard Spear

French Inspector

Eileen Way

Italian Dressmaker

Bruno Barnabe

Head Waiter

Gábor Baraker

Gypsy Baron

Tony Baron

Baby's Boyfriend

Eunice Black

Matron

John Brandon

Radio Engineer

Windsor Davies

Radio Engineer

Franco De Rosa

Romano

John Fordyce

Boy in Orphanage

Yole Marinelli

First Maid

Miki Iveria

Second Maid

Henri Vidon

Priest

Raymond Young

Photographer

Jacqueline Bisset

Dancer

Michael Des Barres

Boy in Orphanage (uncredited)