How many movies have J.K. Rowling and Peter Burgis collaborated on?

They have worked on 9 movies together! Their first movie together was Harry Potter and the Chamber of Secrets (2002) while their highest rated movie together was Harry Potter and the Deathly Hallows: Part 2 (2011). They have not worked together since Fantastic Beasts: The Crimes of Grindelwald (2018). They are most known for their adventure films together.