'Mortal Instruments: City Of Bones' Trailer Debuting Thursday!

Hold on to your seraph blades, Shadowhunter enthusiasts: We've got BIG news! MTV.com has been bestowed the grand honor of debuting the very first teaser trailer for "The Mortal Instruments: City of Bones," starring Lily Collins, Jamie Campbell Bower and Robert Sheehan!

Cue the swoons of a million fangirls!

Based on the urban fantasy novel by Cassandra Clare, "City of Bones" follows seemingly average teen Clary Fray as she uncovers her secret roots in the centuries-old society of demon-destroying warriors known as Shadowhunters.

The film doesn't hit theaters until August 23, 2013, but we'll have your first look on Thursday, November 15, at 10:30 p.m. ET on MTV.com—a day before it debuts in front of "The Twilight Saga: Breaking Dawn - Part 2" in theaters.

So we'll be seeing you Thursday for an EXCLUSIVE date with Clary, Jace and Simon. You won't want to miss it!