Yul Brynner

Victor Fabian

Kay Kendall

Dolly Fabian

Geoffrey Toone

Dr. Richard Hilliard

Maxwell Shaw

Jascha Gendel / Grisha Gendel

Mervyn Johns

Mr. Alonzo Wilbur Jr.

Martin Benson

Luigi Bardini

Harry Lockart

Chester

Gregory Ratoff

Maxwell Archer

Shirley Anne Field

Angela Hooper

Colin Drake

Doctor (uncredited)