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)

Andrew Faulds

Interviewer (uncredited)

Barbara Hall

Secretary (uncredited)

Grace Newcombe

Mrs. Wilbur (uncredited)

Stanley Donen