How many movies have Harmony O'Reilly and Summer O'Reilly acted in together?

They have worked on 3 movies together! Their first movie together was Howard Lovecraft & the Frozen Kingdom (2016) while their highest rated movie together was Howard Lovecraft & the Undersea Kingdom (2017). They have not worked together since Howard Lovecraft and the Kingdom of Madness (2018). They are most known for their horror films together.