“Halloween Horror Nights” at Universal Studios Hollywood got off to a terrifying start as Hollywood celebrities paraded along the blood-red carpet in honor of the event’s opening night festivities, which kicked off Friday, September 16 and will continue on select nights through November 5, 2016.

Attending celebrity guests included Linda Blair (The Exorcist and Founder of the Linda Blair Worldheart Foundation); “American Horror Story” cast, including Evan Peters, Denis O’Hare, Finn Wittrock and Naomi Grossman; Eli Roth (“Eli Roth Presents Terror Tram,” Hostel); director Michael Dougherty (Krampus) and Seth Green (Krampus, “Family Guy”); Ouija: Origin of Evil cast, including Elizabeth Reaser, Annalise Basso, Lulu Wilson, Kate Siegel and director Mike Flanagan; Slash (musician); director James Wan (Insidious and “MacGyver”); Leigh Whannell (Insidious and Sawfranchises); Guillermo Diaz (“Scandal”); Mark Ballas (“Dancing with the Stars”); Diego Boneta (“Scream Queens”); Olivia Holt (“I Didn’t Do It”); Jabbawockeez; and John Murdy, Creative Director at Universal Studios Hollywood and Executive Producer of “Halloween Horror Nights.”

(Photos courtesy of Universal Studios Hollywood)