Jamie Campbell Bower and Lily Collins Jamie Campbell Bower and Lily Collins

Lily Collins and Jamie Campbell Bower have split up, Us Weekly reports. The actors have been together since July 2012, when they met while shooting The Mortal Instruments: City of Bones.

"They remain very good friends," a source says.

Check out more shocking celebrity breakups

Fortunately, the former couple haven't let the split get in the way of the nationwide tour to promote the film. "They've been really good about doing the press tour together for their movie," the source adds. "They were able to stay friendly."

The Mortal Instruments: City of Bones premieres nationwide Aug. 21.