Martin Moszkowicz (@mmoszkowicz) just tweeted:
"The Mortal Instruments - City of Ashes will go into production with Lily Collins, Jamie Campbell Bower directed by Harald Zwart."
Production will commence in the Fall (Aussie Springtime 2013)
I can just hear the whole TMI fandom jumping up and down squealing with glee (me included! :P)
FYI: Martin is the current executive producer of City of Bones