How many movies have David Heyman and Fiona Weir collaborated on?

They have worked on 9 movies together! Their first movie together was Harry Potter and the Goblet of Fire (2005) 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 Secrets of Dumbledore (2022). They are most known for their adventure films together.