How many movies have Bernhard Minetti and Hildegard Grethe acted in together?

They have worked on 2 movies together! Their first movie together was Robert Koch, der Bekämpfer des Todes (1939) while their highest rated movie together was Friedrich Schiller – Der Triumph eines Genies (1940). They have not worked together since Friedrich Schiller – Der Triumph eines Genies (1940).