Justin Bartha has a new girlfriend!

The Hangover star, 34, is dating trainer Lia Smith, a source confirms to Us Weekly.

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The couple were photographed on New Year's Day together relaxing on a beach in Maui, Hawaii. Bartha met Smith, a Pilates instructor at Equinox in L.A., during a session and the twosome have been dating for a while, the source tells Us.

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Smith showed off her hot beach bod in a colorful string bikini top and orange shorts while tanning with The New Normal actor.

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Bartha previously dated Ashley Olsen for two years before calling it quits in March 2011.

This article originally appeared on Usmagazine.com: Justin Bartha Dating Trainer Lia Smith