How many movies have Frank Groothof and Michiel Kerbosch acted in together?

They have worked on 16 movies together! Their first movie together was Sinterklaas in Sesamstraat 1987 (1987) and was their highest rated movie together. They have not worked together since Sinterklaas in Sesamstraat 2003: Pieter de vreemdeling (2003). They are most known for their family films together.