How many movies have Donald Beekman and Pieter Tiddens collaborated on?

They have worked on 2 movies together! Their first movie together was Pieter Tiddens: Boos voor Beginners (2007) and was their highest rated movie together. They have not worked together since Pieter Tiddens: Vooruit! Nog Één Keer Kindercabaret, Nu Nog Anders! (2009).