How many movies have Gerda Havertong and Paula Sleyp acted in together?

They have worked on 23 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 2010 (2010). They are most known for their family films together.