We had such threads on the old board... 
Ok, guys!

Actors:

Marcello Mastroianni
Marlon Brando
Anthony Hopkins
Al Pacino
Jean Gabin
Jack Nicholson
Robert de Niro
Max von Sydow
Orson Welles
Johnny Depp
Humphrey Bogart

Actresses:

Catherine Deneuve
Ingrid Bergman
Greta Garbo
Anouk Aimee
Tatiana Samoilova
Margarita Terekhova
Anna Magnani 
Audrey Hepburn