Maria Schneider

Michelle

Sydne Rome

Ann

Vic Morrow

Vic

Robert Vaughn

Stuart Chase

John Whittington

"Boots" Peter Franklin

Nadja Tiller

Lotte

Carl Möhner

Cyrus Franklin

Clelia Matania

Old Neighbour

Marco Tulli

Commissaire Trieste

Armando Brancia

Inspector Carrara

Georg Marischka

Henderson

Renato Pozzetto

Gianni

Maria Cumani Quasimodo

Princess Ruspini (uncredited)

Margherita Horowitz

Maid (uncredited)

René Clément