Headey, Harris Join "Mortal Instruments"

By Garth Franklin Thursday July 19th 2012 11:01PM

Lena Headey ("Game of Thrones"), Jared Harris ("Mad Men") and Godfrey Gao have joined the cast of "The Mortal Instruments" at Screen Gems and Constantin Films says Variety.

Harald Zwart's adaptation of Cassandra Clare's bestselling young adult novel series follows an ordinary teenager who discovers she is the descendent of a demon-hunting clan.

Headey will play Jocelyn Fray, Harris is Hodge Starkweather and Gao is Magnus Bane. Kevin Durand, Robert Maillet, Lily Collins and Jamie Campbell Bower also star.