Matthew Daddario Alec Lightwood Actor Katherine McNamara Clary Fray Actor Isaiah Mustafa Luke Garroway Actor Alberto Rosende Simon Lewis Actor Dominic Sherwood Jace Wayland Actor Harry Shum Jr. Magnus Bane Actor Emeraude Toubia Isabelle Lightwood Actor Maxim Roy Jocelyn Fray Guest Star Stephanie Bennett Lydia Branwell Guest Star Nicola Correia-Damude Maryse Lightwood Guest Star Nick Sagar Victor Aldertree Guest Star Alan Van Sprang Valentine Morgenstern Guest Star Joanne Jansen Gretel Guest Star Jessica Matten Maria Guest Star McG Executive Producer Todd Slavkin Executive Producer Darren Swimmer Executive Producer Michael Reisz Executive Producer Matthew Hastings Executive Producer Mary Viola Executive Producer Martin Moszkowicz Executive Producer Robert Kulzer Executive Producer