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)