Ernst Lubitsch was a German-born American film director, producer, writer, and actor. He is best known for his sophisticated comedies and satires. His most famous works include 'Trouble in Paradise' (1932) and 'The Shop Around the Corner' (1940). Ron Lubitsch was his son, who followed in his father's footsteps and became a film director and producer. Elia Kazan was an American director, producer, writer, and actor. He is best known for his work on films such as 'On the Waterfront' (1954) and 'A Streetcar Named Desire' (1951). All three of these men were influential directors in their respective fields.