Hereditary is a 2018 American horror film written and directed by Ari Aster, in his feature directorial debut. It stars Toni Collette, Alex Wolff, Milly Shapiro, Ann Dowd, and Gabriel Byrne, and follows a family haunted after the death of their secretive grandmother. Hereditary premiered on January 21, 2018, in the Midnight section at the 2018 Sundance Film Festival,[3] and was theatrically released in the United States on ..