Lily Collins, Jamie Campbell Bower Split After A Year Of Dating

08/08/2013 03:00 pm ET

The "Mortal Instruments: City of Bones" co-stars have reportedly ended things after a year of dating, sources tell Us Weekly. The pair, who were first romantically linked in July 2012, "remain very good friends," an insider adds.

Collins and Campbell Bower, both 24, have been busy promoting the supernatural flick all summer and will attend numerous events together in the coming weeks before the film's Aug. 21 release.

"They've been really good about doing the press tour together for their movie," a source tells Us Weekly of the exes. "They were able to stay friendly."

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