Amanda Seyfried & Boyfriend 'Taking a Break'

By Brian Orloff

Wednesday May 19, 2010 05:50 PM EDT

Dominic Cooper and Amanda Seyfried

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In a recent interview, Amanda Seyfried said she wasn't sure if her British beau Dominic Cooper is "the one." As it turns out, he isn't – at least for now.

PEOPLE confirms that Seyfried, 24, and Cooper, 31, are no longer dating. "Amanda and Dominic have been on and off for a while – and right now they're taking a break," a source says. "But they're great friends and could still get back together."

While Seyfried has been promoting her new movie Letters to Juliet, Cooper has been at the Cannes Film Festival, where he was spotted talking to Seyfried's former Mean Girls costar Lindsay Lohan – and even had his arm around her waist at a party Wednesday night.

RELATED: Amanda Seyfried Unsure If Her Boyfriend Is 'The One'

Seyfriend and Cooper met while filming 2008's Mamma Mia!. The two had maintained a long-distance relationship, keeping in touch via Skype or hopping on planes in between their busy schedules. "There's nothing easy about [it]," Seyfriend tells InStyle Hair this month.

A rep for the actress could not be reached for comment.

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