How many movies have David Heyman and Mark Bartholomew collaborated on?

They have worked on 6 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 Harry Potter and the Deathly Hallows: Part 2 (2011). They are most known for their adventure films together.