Hereditary

Ari Aster's 2018 debut is the scariest film of the 21st century, with a 92% Rotten Tomatoes score. Toni Collette's towering performance anchors a relentless exploration of grief and occult horror, delivering a visceral emotional intensity that outperforms #6 Rosemary's Baby in sheer dread. The film's budget of just $10 million grossed over $80 million worldwide, proving its cultural impact.