Sony’s Screen Gems is working with Constantin Film and Unique Features to develop the film franchise Mortal Instruments, based on the book series by Cassandra Clare. 

Jessica Postigo has written the script based on the first book in the series, City of Bones. The story follows a teenager who discovers she is the descendent of Shadowhunters, a secret group of demon-battling warriors.

Constantin Film’s head of Film & TV Martin Moszkowicz will executive produce and Robert Kulzer will produce for Constantin, along with producing partners Michael Lynne, Robert Shaye, and executive producer Dylan Sellers for Unique.

Clint Culpepper, Screen Gems’ President, and Eric Paquette, Screen Gems’ SVP of Production, will oversee the project for the studio.

The other books in the series are City of Ashes, City of Glass and the upcoming City of Fallen Angels. 

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