How many movies have Dominic Monaghan and Mark Robins collaborated on?

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 X-Men Origins: Wolverine (2009). They are most known for their action films together.