How many movies have Andy Serkis and Dominic Monaghan acted in together?

They have worked on 4 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 Star Wars: The Rise of Skywalker (2019). They are most known for their action films together.