Jamie Campbell Bower and his fiancee Bonnie Wright are officially over -- and Bower, 23, may already be moving on.

"Bonnie and Jamie split a while ago," an insider tells Us Weekly of the pair, who got engaged in April 2011. "It was amicable, but things had not been going right for some time. It's sad."

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Prior to their engagement, Wright (known to Harry Potter fans for her portrayal of Ginny Weasley in the series) and Bower stayed relatively mum on their relationship; the pair first confirmed they were a couple at the BAFTAs in February 2010, though they had been dating since 2009. "Yes, we're dating," Wright, 21, told a reporter. "We've been seeing each other for a few months, it's good."

Bower, for his part, seems focused on moving forward. On Monday, the Twilight actor was photographed holding hands with his Mortal Instruments costar, Lily Collins.

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The Mirror, Mirror star is newly single as well; Collins called it quits with Zac Efron in early June, with whom she enjoyed a quick, three-month spring fling earlier this year.

"They're no longer together. They were never serious, though; it was just a casual thing and it fizzled," one insider explained, blaming the distance between the pair. "They were never in the same place at the same time."

This article originally appeared on Usmagazine.com: Jamie Campbell Bower, Bonnie Wright Call Off Engagement