Popsugar Entertainment Halloween Horror Movie Heroes Costume Ideas 15 Horror Movie Halloween Costumes That Will Have You Kicking Ass on Oct. 31 October 29, 2017 by Quinn Keaney View On One Page Photo 9 of 15 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 9 Father Merrin From The Exorcist What to wear: A black priest's habit with a long black coat and a wide-brimmed black hat. Wear a crucifix around your neck, too! How to act: Extremely wise, and unafraid of facing down your (literal) demons. Previous Next Start Slideshow HalloweenHalloween CostumesPop Culture Halloween CostumesMoviesHorrorScary Halloween Costumes