Back in the fall of 2010, we brought you news of Screen Gems, Constantin Films, and Unique Features’ joint production to bring author Cassandra Clare‘s New York Times best-selling book series The Mortal Instruments to the big-screen. Lily Collins (Mirror Mirror, Priest) stars as Clary Fray, the protagonist, with Jamie Campbell Bower (The Twilight Saga: Breaking Dawn) as the love interest, Jace Wayland. Director Harald Zwart (The Karate Kid, One Night at McCool’s) is at the helm of this project with script by Jessica Postigo.

Variety reports that the latest casting news for The Mortal Instruments finds Kevin Durand (Resident Evil: Retribution, X-Men: Origins) and Robert Maillet (Pacific Rim, Sherlock Holmes) landing roles as baddies Pangborn and Blackwell respectively in the adaptation of this young adult book series.

Synopsis for City of Bones, the first book of The Mortal Instruments series:

City of Bones begins with a sixteen-year old girl named Clary Fray, who lives in New York with her mother, an artist. She comes home one night to find her apartment ransacked, her mother gone — and a slavering demon ready to tear off her head. Once the demon’s dealt with, Clary follows the clues to her mother’s disappearance into an alternate New York filled with hideous demons, hard-partying warlocks, not-what-they-seem vampires, an army of werewolves and the scariest thing of all: the secrets of her mother’s past. She also finds herself torn between two boys — her best friend Simon, for whom she’s developing new feelings, and the mysterious demon hunter Jace, who has a past more tangled than her own. She becomes a part of the secret word of the demon hunters, or Nephilim, and as she does discovers she might be more connected to them than she originally thought.

The Mortal Instruments is slated to hit theaters August 23, 2013.