Lily Collins, Jamie Campbell Bower Break Up [VIDEO]: 'Mortal Instruments: City of Bones' Co-Stars Call it Quits After 1 Year of Dating, Still Have to Work Together

Jamie Campbell Bower and Lily Collins might have fallen for each other while filming their latest movie The Mortal Instruments: City of Bones, but since wrapping the two apparently drifted apart in regards to their relationship. They are very much together as part of the press tour for the film, but they are no longer a couple, putting an end to their one-year relationship. So is it awkward between the two since they have to promote the film and eventually film the sequel, City of Ashes?

"They've been really good about doing the press tour together for their movie," a source explained. "They were able to stay friendly. They remain very good friends."

So it looks like it isn't awkward after all!

Check out a trailer for City of Bones right here:

Mstars recently reported on this upcoming Young Adult movie. Here is an excerpt:

Hoping to bank on the success of other "Young Adult" novels turned into films such as the Twilight and The Hunger Games series, The Mortal Instruments: City of Bones has released a new trailer. This early preview invites us into a world that is unseen by the mortal eyes: a world of demons who are hunted by half-angels. The movie stars Lily Collins as Clary Fray, an unsuspecting young girl who is able to see into this other realm. Also starring in this film is Collins' real-life boyfriend and former Twilight and Harry Potter actor Jamie Campbell Bower. Jonathan Rhys Meyers portrays the film's antagonist and Lena Headey of "Game of Thrones" plays Clary's mother, Jocelyn. This movie comes out August 23, 2013.

Here is a summary of the story provided by SlashFilm:

In the series' first book, the #1 New York Times bestseller "The Mortal Instruments: City of Bones," set in contemporary New York City, a seemingly ordinary teenager, Clary Fray, 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.