 His acting career continued into the sound film era and he appeared in approximately ninety sound films.Shortly after Adolf Hitler seized power, he became a fervent National Socialist and carried the Flag of Nazi Germany for the student representatives at the May Day rally in Tempelhof.He also participated as an actor in several Nazi propaganda films, such as "Ohm Krüger" and the pro-euthanasia film "Ich klage an", both released in 1941.