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Lily Collins and Jamie Campbell Bower Split

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Lily Collins and Jamie Campbell Bower promote 'The Mortal Instruments' (Gilbert Carrasquillo/FilmMagic)

Well, this could make for an awkward press tour.

"The Mortal Instruments: City of Bones" co-stars Lily Collins and Jamie Campbell Bower have broken up, sources confirm to omg!.

The couple — who met on set of the film — began dating in July 2012.

"They actually broke up a while ago," one insider close to the former couple tells omg!. "They are promoting the film together and it's not dramatic. They are both extremely professional."

Need further proof?

No one seemed any the wiser that the two were on the outs when Lily, 24, and Jamie, 24, appeared at Comic-Con last month where they were promoting "The Mortal Instruments" and apparently no longer dating.

Bower — who was engaged to "Harry Potter" actress Bonnie Wright before quietly splitting up in June 2012 — appears to have already moved on. He was photographed getting cuddly recently with fashion blogger Zina Charkoplia.

Zina posted affectionate photos of her and Jamie last month at a music festival in Portugal.

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Jamie Campbell Bower cozies up to Zina Charkoplia (Instagram)

Collins recently opened up in the September issue of Seventeen about her relationship with Jamie.

"We've made a conscious decision to go out and live life," Lily explained at the time. "I'm not one to hide anything, but I don't feel the need to comment directly on it … I think it would be a shame to not live in the moment and not enjoy everything that's happening in fear of other people's opinions."

It's important to note that long lead interviews like the one Lily did with Seventeen are conducted months in advance of the magazine's publish date.

"The Mortal Instruments" is an ongoing franchise, so, depending on the movie's success, Lily and Jamie may be working together for quite some time.

Do you hope these two get back together? Vote in our poll below!

See other stars who have split in 2013 in the gallery below:

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