How many movies have Fran Walsh and Lee Hartley collaborated on?

They have worked on 3 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 Lord of the Rings: The Return of the King (2003). They are most known for their fantasy films together.