How many movies have Freddie Prinze Jr. and Mo Henry collaborated on?

They have worked on 4 movies together! Their first movie together was I Know What You Did Last Summer (1997) while their highest rated movie together was Scooby-Doo 2: Monsters Unleashed (2004). They have not worked together since Scooby-Doo 2: Monsters Unleashed (2004). They are most known for their mystery films together.