Adelaide Clemens as Heather Mason / Sharon Da Silva / Alessa

Sean Bean as Harry Mason / Christopher Da Silva

Radha Mitchell as Rose Da Silva

Carrie-Anne Moss as Claudia Wolf

Malcolm McDowell as Leonard Wolf

Kit Harington as Vincent Carter

Deborah Kara Unger as Dahlia Gillespie

Martin Donovan as Douglas Cartland

Erin Pitt as Young Alessa Gillespie

Peter Outerbridge as Travis Grady

Jefferson Brown as Detective Santini

Milton Barnes as Detective Cable

Rachel Sellan as Mannequin Girl

Arlene Duncan as Teacher

Boyd Banks as Priest

Jacky Lai as Student

Conrad Bergschneider as Caretaker

Peter Schoelier as Vagrant

Heather Marks as Suki

Roberto Campanella as Pyramid Head

James Kirchner as Grey Man

Darren Josephs as Uniformed Cop

Roman Lebeau as Business Man

Sergey Shpakovsky as Fry Cook

Chad Camilleri as Attacker

Carrie Eklund as Dark Nurse