Cornelia Sharpe as Lavinia Kean

Omar Sharif as Baron Cesare Magnasco

Robert Lansing as Owen Hooper

Anita Ekberg as Dr. Else Biebling

Fabio Testi as Rudolf Caserta

William Traylor as Lacey

Isabella Rye as Fanya

Thom Christopher as Eddie Bronzi

Mario Colli as Alfredo Mucci

Claudio Ruffini as Larue

Geoffrey Copleston as UN Speaker

Fortunato Arena as Paesano

Gino Marturano as Maj. Danilo

Emilio Messina as Zel