Dirk Bogarde

Max

Charlotte Rampling

Lucia

Philippe Leroy

Klaus

Gabriele Ferzetti

Hans

Giuseppe Addobbati

Stumm

Isa Miranda

Countess Stein

Nino Bignamini

Adolph

Marino Masé

Atherton

Amadeo Amodio

Bert

Piero Vida

Day Porter

Geoffrey Copleston

Kurt

Manfred Freyberger

Dobson

Nora Ricci

The Neighbor

Piero Mazzinghi

Concierge

Luigi Antonio Guerra

Bit Role (uncredited)

Anthony Forwood

Opera Audience (uncredited)

Tonino Tommasi

Hotel Guest (uncredited)