Lily Collins & Jamie Campbell Bower: New 'Mortal Instruments' Poster!

Lily Collins and Jamie Campbell Bower keep it tense in this newly released poster for their latest film Mortal Instruments: City of Bones, which hits theaters on Wednesday, August 21!

The 24-year-old actress and the 24-year-old actor were joined in the poster by Kevin Zegers, Jemima West, and Robert Sheehan.

PHOTOS: Check out the latest pics of Lily Collins

Mortal Instruments: City of Bones centers on “a demon, a seemingly ordinary teenage girl, Clary Fray, who finds out truths about her past and bloodline on her quest to get her back, that changes her entire life.”

Bigger pic inside…