How many movies have Gert Verhulst and Iris Hesseling collaborated on?

They have worked on 3 movies together! Their first movie together was Anubis and the Revenge of Arghus (2009) while their highest rated movie together was House of Anubis (NL): The Legend of the Ghost-theatre (2009). They have not worked together since House of Anubis and the return of Sibuna (2010). They are most known for their family films together.