Top 10  Scariest Movies of All Time

10 Scariest Horror Movies of All Time, According to Rotten Tomatoes

10. IT: Chapter One (2017)

9. Insidious (2010)

8. Sinister (2012)

7. Halloween (1978)

6. The Ring (2002)

5. The Exorcist (1973)

4 The Babadook

3. Alien (1979)

2. The Conjuring (2013)

1. Hereditary (2018)