How many movies have Dave Mustaine and David Ellefson acted in together?

They have worked on 13 movies together! Their first movie together was Megadeth: [1990] Rust in Detroit (1990) while their highest rated movie together was The Big Four: Live in Sofia (2010). They have not worked together since Megadeth Bloodstock 2017 (2017). They are most known for their music films together.