Jamie Campbell Bower lays the charm on Lily Collins in the new international trailer for The Mortal Instruments: City of Bones.

Set in contemporary New York City, a seemingly ordinary teenager, Clary Fray (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.

The Mortal Instruments: City of Bones opens August 23rd.

Robert Sheehan poses in the press room with Laura Whitmore at the 2013 Jameson Empire Awards held at the Grosvenor House Hotel on Sunday evening (March 24) in London, England.

The 25-year-old Mortal Instruments actor was on hand to present the Best Comedy honors, which went to Ted.

PHOTOS: Check out the latest pics of Robert Sheehan

Also spotted on the carpet: Romeo and Juliet star Douglas Booth.

Just the weekend before, Douglas stepped out for the David Bowie Is… exhibition.

10+ pics inside of Robert Sheehan and Douglas Booth… More Here! »

Jamie Campbell Bower leans in for a kiss from Lily Collins in this exclusive, new still from The Mortal Instruments: City of Bones.

Set in contemporary New York City, a seemingly ordinary teenager, Clary Fray (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.

Out on August 23rd, the movie also stars Jonathan Rhys-Meyers, Kevin Zegers, Jemima West, and Robert Sheehan.

ARE YOU EXCITED to see The Mortal Instruments? More Here! »

Robert Sheehan hits the English National Ballet Christmas Party held at St. Martins Lane Hotel on Thursday evening (December 13) in London, England.

The 24-year-old The Mortal Instruments actor looked handsome in a leather jacket and a t-shirt that read: “Make Music Not Missiles!”

PHOTOS: Check out the latest pics of Robert Sheehan

Robert is currently enjoying some down time after wrapping The Mortal Instruments in Toronto, Canada.

Be sure to check out the trailer for The Mortal Instruments: City of Bones which hits theaters August 23, 2013!

The trailer and poster for Lily Collins and Jamie Campbell Bower‘s upcoming movie The Mortal Instruments: City of Bones have arrived!

Here is the film’s synopsis: Set in contemporary New York City, a seemingly ordinary teenager, Clary Fray (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.

The film, which will hit theaters on August 23, 2013, also stars Jonathan Rhys-Meyers, Kevin Zegers, Jemima West, and Robert Sheehan.

WHAT DO YOU THINK of the trailer for The Mortal Instruments: City of Bones?

Jamie Campbell Bower holds Lily Collins back in this first look at The Mortal Instruments: City of Bones from MTV.

“It’s really a story that’s based in reality as much as it is in this fantasy world. They’re coexisting,” Lily, 23, shared in the video of the film. “It’s more emotionally and character-based than just aesthetically beautiful. It’s got amazing imagery and the CGI is going to be incredible, but it’s not just about that.”

Co-star Robert Sheehan, who plays Simon, dished about his experience with the fans in Toronto, where they’re filming.

“There were fans there waiting for us,” he shared. “I was like, this isn’t my book! So that was quite odd…but I did it anyway.”

The Mortal Instruments: City of Bones hits theaters in August 2013.

Lily Collins poses with Kevin Zegers, Jamie Campbell Bower, Robert Sheehan and Jemima West in this new cast pic from a recent photo call for The Mortal Instruments: City of Bones in Toronto, Canada.

The five stars of the film met up with press outlets to kick off production for the book-based film, which is set for release in August 2013.

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, 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.