Tony Curtis

Character: Nick Johnson

Rosanna Schiaffino

Character: Francesca di Rienzi

Lionel Jeffries

Character: Parker

Zsa Zsa Gabor

Character: Gigi

Fenella Fielding

Character: Fenella

Anna Quayle

Character: Aunt Miriam

Nancy Kwan

Character: Baby

Warren Mitchell

Character: Conte de Rienz / Maximillian

Mischa Auer

Character: Romeo

Noel Purcell

Character: Capt. Daniel O'Flannery

Alan Gifford

Character: American Brasshat

Joseph Fürst

Character: German Brasshat

Monti DeLyle

Character: Butler

Bernard Spear

Character: French Inspector

Eileen Way

Character: Italian Dressmaker

Bruno Barnabe

Character: Head Waiter

Gábor Baraker

Character: Gypsy Baron

Tony Baron

Character: Baby's Boyfriend

Eunice Black

Character: Matron

John Brandon

Character: Radio Engineer

Windsor Davies

Character: Radio Engineer

Franco De Rosa

Character: Romano

John Fordyce

Character: Boy in Orphanage

Yole Marinelli

Character: First Maid

Miki Iveria

Character: Second Maid

Henri Vidon

Character: Priest

Raymond Young

Character: Photographer

Jacqueline Bisset

Character: Dancer

Michael Des Barres

Character: Boy in Orphanage (uncredited)