We’ve been telling you about The Mortal Instruments: City of Bones since 2010. Now, happily, after months of casting news – great casting news – we have the official trailer, a poster, and the official synopsis. Dig in:

Trailer – The Mortal Intruments: City of Bones
[youtube]http://youtu.be/hc4CiTvQ-YE[/youtube]

Set in contemporary New York City, a seemingly ordinary teenager, Clary Fray (Lily Collins), discovers she is the descendant of a line of Shadowhunters, a secret cadre of young half-angel warriors locked in an ancient battle to protect our world from demons. After the disappearance of her mother (Lena Headey), Clary must join forces with a group of Shadowhunters, who introduce her to a dangerous alternate New York called Downworld, filled with demons, warlocks, vampires, werewolves and other deadly creatures. Based on the worldwide best-selling book series.

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