How many movies have David Heyman and Rob Bliss collaborated on?

They have worked on 7 movies together! Their first movie together was Harry Potter and the Philosopher's Stone (2001) while their highest rated movie together was Harry Potter and the Prisoner of Azkaban (2004). They have not worked together since Fantastic Beasts: The Crimes of Grindelwald (2018). They are most known for their adventure films together.