How many movies have Dirk Lavrysen and Harold Mertens collaborated on?

They have worked on 2 movies together! Their first movie together was Studio 100: De 3 Biggetjes (2003) while their highest rated movie together was Studio 100 Sprookjes Musicals - De Kleine Zeemeermin met Kathleen van K3 (2007). They have not worked together since Studio 100 Sprookjes Musicals - De Kleine Zeemeermin met Kathleen van K3 (2007).