How many movies have Fran Walsh and Mana Hira Davis collaborated on?

They have worked on 5 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 The Hobbit: An Unexpected Journey (2012). They are most known for their action films together.