How many movies have Helmut Zerlett and Wolfgang Groos collaborated on?

They have worked on 5 movies together! Their first movie together was When Inge Is Dancing (2013) while their highest rated movie together was Vampire Sisters 2: Bats in the Belly (2014). They have not worked together since Granny Nanny (2020). They are most known for their comedy films together.

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Sanitäter (uncredited)