How many movies have Gerd Michael Henneberg and Martin Seifert acted in together?

They have worked on 3 movies together! Their first movie together was Am grauen Strand, am grauen Meer (1980) while their highest rated movie together was Your Unknown Brother (1982). They have not worked together since Ich, Thomas Müntzer, Sichel Gottes (1989). They are most known for their drama films together.