How many movies have Gert-Jan Booy and Hans Bourlon collaborated on?

They have worked on 4 movies together! Their first movie together was House of Anubis (NL) - The Five and the Wrath of Balor (2010) while their highest rated movie together was Ghost Rockers voor Altijd (2016). They have not worked together since Nachtwacht: De Dag van de Bloedmaan (2021). They are most known for their family films together.