How many movies have Chris Helcermanas-Benge and Olivia Cheng collaborated on?

They have worked on 3 movies together! Their first movie together was The Art of War II: Betrayal (2008) while their highest rated movie together was Signed, Sealed, Delivered (2013). They have not worked together since Signed, Sealed, Delivered (2013). They are most known for their action films together.