- Judith Roberts - Jolene July
- Mason Yam - Tom (Real World Kid)
- Jack Brunault - Jack (Real World Kid)
- Maxim Swinton - Smallest Demon Kid
- Ian Carlsen - Man
- Sam Zephir - 2nd Trooper
- Kevin Fennessy - Charters
- Brendan Meehan - Eric
- Tim Guinee - Nathan Demeter
- Victor Slezak - Horace Haber
- Kim Director - Sasha
- Jim Norton - Hicks
- Celeste Oliva - Female Trucker
- Paulina Singer - Willa
- Rhys Olivia Cote - Blindfolded Demon Girl
- Rhys Olivia Cote - Demon Girl
- Michael Maize - Ives
- Megan McQuillan - Karen Moore
- Jackson Mercado - Brian Johnson
- Josephine Moshiri Elwood - Molly
- Ronald Boone - F.B.I Agent (uncredited)
- Jamie Ghazarian - Theater Geek (uncredited)
- Ken Kansky - Brewster Party Guest (uncredited)
- Lynn L'Heureux - Drunk Party Girl (uncredited)
- Rob Lévesque - Crime Scene Photographer (uncredited)
- Karen Pittman - Angela Brewster
- Kayla Harrity - Maggie's Brunette
- January LaVoy - Celeste Henderson
- Daniel Washington - Orderly
- Jaime Llorens - Brown University Student (uncredited)
- Ivan Hoey Jr. - Teenage Bing
- Larry Mitchell - John Partridge
- Miriam Silverman - June Partridge
- Elizabeth Stanley - Sharon Smith
- Owen Burke - Steve
- Mam Smith - Middle-Aged Mom
- Sean Rogers - Cashier
- James Wilcox - Bald Man
- Sonnie Brown - Mary Simonson
- Gisela Chipe - Dr. Hart
- Skyler Wright - Kristen
- Brandon Santana - Jon
- Margot Anderson-Song - Demon Kid (uncredited)
- Margot Anderson-Song - Kid Under Ice (uncredited)
- Joseph Oliveira - Biker at Bike Fair (uncredited)
- Bruce Altman - Dr. Nathaniel Janes
- Rena Maliszewski - Physician
- Morgan Lindholm - Young Jolene July
- Jaime Blanch - Anesthesiologist
- Genesis Oliver - Orderly
- Jose Guns Alves - Nurse #1
- Natasha Yvette Williams - Nurse #2
- Jenna Doolittle - Dr. Andrews
- Chris McKinney - Sheriff Bly
- Jamie Neumann - Tiffany Jones
- Rarmian Newton - Drew
- Darby Camp - Haley Smith
- Asher Miles Fallica - Daniel Moore
- Brenda Wehle - Mrs. Myers
- Omar Ghonim - Young Owner
- Danny Deferrari - Travis
- Owen Myre - Kid #2
- Laila Lockhart Kraner - Kid #3
- James L. Leite - Biker Bar Patron (uncredited)
- Nicole Ehinger - Brenda
- Misha Osherovich - Simon
- Lisa Miranda - Bartender
- Sarah Boatright - Steampunk
- Suzanne Gillies - The Brewsters Housekeeper (uncredited)
- Louise Mara - Pedestrian (uncredited)
- Bruce-Robert Serafin - Hal Schnell
- Nancy De Mayo - Officer
- Larry Vigus - Sam
- Oscar Wahlberg - Matty
- Pierson Salvador - Bradley
- Rebecca Gibel - Tina Harrison
- Scot Ruggles - Paul Helm
- Al Thompson - Zach Jones
- Susan Halsey Singer - Bar Patron (uncredited)
- Susan Halsey Singer - Funeral Guest (uncredited)
- Brigid Ryan - Ellen Thornton
- Dana de Celis - Dr. Debra Clark
- Vishaal Reddy - Malik Patel
- William Ragsdale - Auctioneer
- Jennifer Dorr White - Dentist
- Jennifer Dorr White - Dental Hygienist
- Reg Rogers - Abe
- Tom Savini - Snake
- Beth Petrou - Agent Ash
- Michael Tow - Agent Chen
- Lewis D. Wheeler - Surgeon
- Paul Schneider - Jonathan 'The Hourglass' Beckett
- Norm Lewis - Dr. Gregory
- Jaison Hunter - Bartender
- June Baboian - Nurse
- Aidan Pierce Brennan - Young Manx
- Dalton Harrod - Craig Harrison
- Gary Wilmes - Mr. Tim
- Samantha Soule - Betty Manx
- Preston Langlois - Alex
- David Pridemore - John #1
- Max Alagna - Gravedigger
- Sweta Keswani - Chitra Surinam
- Murphy Guyer - FBI Agent Daltry
- Bella May Mordus - Young Vic
- Brian Distance - Police Officer
- Charles Coan - Pedestrian (uncredited)
- Celeste Arias - Cassie Manx
- Kiley Liddell - Demon Annie
- Brooke Liddell - Demon Amy
- Jason David - Wayne McQueen
- Sarah Catherine Hook - Rikki
- Giullian Yao Gioiello - Nat
- John James Cronin - Mike Demeter
- Charlie Tacker - Joel
Ashleigh Cummings hace el papel de Vic McQueen.
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