Ethan Hawke

as Bruce Kenner

Emma Watson

as Angela Gray

David Thewlis

as Professor Kenneth Raines

Lothaire Bluteau

as Reverend Beaumont

Dale Dickey

as Rose Gray

David Dencik

as John Gray

Devon Bostick

as Roy Gray

Aaron Ashmore

as George Nesbitt

Peter MacNeill

as Police Chief Cleveland

Adam Butcher

as Brody

Jacob Neayem

as Charlie Klemme

Aaron Abrams

as Farrell

Catherine Disher

as Kate

Danielle Bourgon

as Secretary at Police Station

Julian Richings

as Tom

Kristian Bruun

as Andrew

Luke Marty

as Officer

Wendy Lyon

as Norma

Kaitlin Kocsis

as Teenage Girl

Samantha Tenus

as Teenage Girl

J.C. Kenny

as TV News Anchor

Maura Grierson

as TV Reporter

Patrick Garrow

as TV Presenter

Janet Porter

as S. Cooper

Pamela MacDonald

as Woman with Grocery Cart

Lenno Britos

as Driver

Steve Whistance-Smith

as Passenger (as Steven John Whistance Smith)

Deborah Grover

as Old Woman

Arlene Frattini

as Naked Old Woman

Emily Haughton

as Ms. Gray (Still)

Jessica Field

as Angela at 10 years (Still)

Adam Gullusci

as Roy at 14 years (Still)

Adrian Griffin

as Doctor

Kirk Gordon

as Prison Guard

Heidi Malley

as Victim

Kate Stephey

as Young Satanist Woman

Audrey Potter

as Baby

Olivia Potter

as Baby

Lauren Jenkins

as Baby

Charley Jenkins

as Baby

Nick Longo

as Satanist

Lisa Horvath

as Satanist

Goran Stjepanovic

as Satanist

Carrie Eklund

as Satanist

Heather Lapine

as Satanist

James Preston Rogers

as Satanist

Stephen Hughes

as TV Voice Over (voice)

Vanessa Spencer

as Satanist (uncredited)

Noah Segura

as Reverend Simmons (uncredited)

Attila Sebesy

as Cult Member (uncredited)

Mackenzie Kerfoot

as Praying Girl (uncredited)

Alli McLaren

as Girl (uncredited)