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 Alan Van Sprang Valentine Morgenstern Guest Star Maxim Roy Jocelyn Fray Guest Star Shailene Garnett Maureen Guest Star Lisa Marcos Susanna Vargas Guest Star Vanessa Matsui Dorothea "Dot" Rollins Guest Star Joel Labelle Alaric Rodriguez Guest Star Jordan Madley Athletic Woman Guest Star Curtis Morgan Emil Pangborn Guest Star Ed Decter Executive Producer McG Executive Producer