Lily Collins as Clary Fray

Jamie Campbell Bower as Jace Wayland

Robert Sheehan as Simon Lewis

Kevin Zegers as Alec Lightwood

Jemima West as Isabelle Lightwood

Lena Headey as Jocelyn Fray

Aidan Turner as Luke Garroway

Jared Harris as Hodge Starkweather

Jonathan Rhys Meyers as Valentine

Kevin Durand as Pangborn

Harry Van Gorkum as Alaric

Godfrey Gao as Magnus Bane

CCH Pounder as Dorothea

Robert Maillet as Blackwell

Stephen R. Hart as Brother Jeremiah

Chad Connell as Lambert

Chris Ratz as Eric

Elyas M'Barek as The Vampire Leader

Pedro Miguel Arce as Bouncer

Matthew Cheng as Magnus' Brother

Carlos Gonzalez-Vio as Vampire Henchman

Melantha Blackthorne as Dumort Vampire (uncredited)

Adam Bogen as Vampire Mercenary (uncredited)

Andre Givogue as Vampire (uncredited)

Jonathan Seinen as Raziel (uncredited)

Bonnie Siu as Blue Mohawk Girl (uncredited)

Gregory Terlecki as Silent Brother (uncredited)

Christopher Maleki as Dark Haired Demon (uncredited)

Jerry A. Ziler as Bar Patron (uncredited)