How many movies have Catherine Maguire and Philippa Boyens collaborated on?

They have worked on 7 movies together! Their first movie together was The Lord of the Rings: The Fellowship of the Ring (2001) while their highest rated movie together was The Lord of the Rings: The Return of the King (2003). They have not worked together since Mortal Engines (2018). They are most known for their adventure films together.