How many movies have David Heyman and Michael Gambon collaborated on?

They have worked on 9 movies together! Their first movie together was Harry Potter and the Prisoner of Azkaban (2004) while their highest rated movie together was Harry Potter and the Deathly Hallows: Part 2 (2011). They have not worked together since Paddington 2 (2017). They are most known for their adventure films together.