D'entre a suya filmografía, se puet destacar bell unas d'as suyas cintas, como Der blaue Engel (1930, Josef von Sternberg, con Emil Jannings, Kurt Gerron y Rosa Valetti), The Garden of Allah (1936, Richard Boleslawski, con Charles Boyer, Basil Rathbone y C. Aubrey Smith), Angel (1937, Ernst Lubitsch, con Herbert Marshall, Melvyn Douglas y Edward Everett Horton), Witness for the Prosecution (1957, Billy Wilder, con Tyrone Power, Charles Laughton y Elsa Lanchester), u Judgment at Nuremberg (1961, Stanley Kramer, con Spencer Tracy, Burt Lancaster, Richard Widmark, Maximilian Schell, Judy Garland y Montgomery Clift).