Welcome to Monster Madness 2019!! Tony and James review the best horror movie of 2018 Hereditary. It's an American supernatural psychological horror drama film written and directed by Ari Aster, in his feature directorial debut. It stars Toni Collette, Alex Wolff, Milly Shapiro and Gabriel Byrne. When the matriarch of the Graham family passes away, her daughter and grandchildren begin to unravel cryptic and increasingly terrifying secrets about their ancestry, trying to outrun the sinister fate they have inherited.