Ernst Lubitsch Alfred Hitchcock Fritz Lang Jean Renoir Rudolph Valentino Marlene Dietrich Ronald Colman Charles Boyer studios World War I
Other moviemakers arrived from Europe after World War I: directors like Ernst Lubitsch, Alfred Hitchcock, Fritz Lang and Jean Renoir; and actors like Rudolph Valentino, Marlene Dietrich, Ronald Colman, and Charles Boyer. They joined a homegrown supply of actors—lured west from the New York City stage after the introduction of sound films—to form one of the 20th century's most remarkable growth industries. At motion pictures' height of popularity in the mid-1940s, the studios were cranking out a total of about 400 movies a year, seen by an audience of 90 million Americans per week.
