With the beginnings of Hollywood, the star system was born with an archetypal bad girl - the vampish Theda Bara - and the good girl - the blazingly sincere Lillian Gish. From the 1920s, vivacious Clara Bow and seductive siren Louise Brooks are most remembered, but none made the impact of Marlene Dietrich, an icon of mystery, or Greta Garbo, with her perfect features and gloomy ...