How many movies have Frits van Wenkop and Jan Kruyk acted in together?

They have worked on 4 movies together! Their first movie together was Vrijbuiters Van Het Woud (1965) while their highest rated movie together was Two Boys and an Old Car (1969). They have not worked together since Sjors en Sjimmie en de Rebellen (1972). They are most known for their family films together.