The Sisters

Susan Strasberg

Martha

Nathalie Delon

Diana

Massimo Girotti

Alex

Giancarlo Giannini

Dario

Lars Bloch

Martha's Lover

Franco Abbiana

Party Guest

Gianni Pulone

Party Guest

Attilio Dottesio

Party Guest

Rossana Canghiari

Train Passenger (uncredited)

Alfonso Giganti

Diana's Driver (uncredited)

Filippo Perego

Party Guest (uncredited)