How many movies have Alejandro González Iñárritu and Naomi Watts collaborated on?

They have worked on 3 movies together! Their first movie together was 21 Grams (2003) while their highest rated movie together was Birdman or (The Unexpected Virtue of Ignorance) (2014). They have not worked together since Birdman or (The Unexpected Virtue of Ignorance) (2014). They are most known for their drama films together.