How many movies have Fran Walsh and Stephen Gallagher collaborated on?

They have worked on 5 movies together! Their first movie together was The Hobbit: An Unexpected Journey (2012) while their highest rated movie together was The Hobbit: The Desolation of Smaug (2013). They have not worked together since The Lord of the Rings: The War of the Rohirrim (2024). They are most known for their adventure films together.