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    Justin Bartha Engaged? Girlfriend Lia Smith Steps Out With Giant Diamond Ring

    Justin Bartha, Lia Smith

    Justin Bartha's lady has some serious bling on that finger.

    The actor has yet to officially confirm he and personal trainer Lia Smith are engaged, but that diamond's not doing anything to dispel the rumors! The reported fiancés stepped out Thursday in L.A., joined by Bartha's French bulldog, and Smith's rock sure looked like a we're-getting-married piece of jewelry.

    A source tells People that Bartha, 34, and his supposed fiancée are "very happy." According to the mag, the duo made their public debut as a couple this past New Year's Day when they were photographed together in Hawaii. (The New Normal star was previously linked to Ashley Olsen for two years before reportedly calling it quits in 2011.)

    PHOTOS: More stars show off their impressive bling!

    Hopefully Bartha won't run into any of the same prewedding struggles his character Doug faced in The Hangover. But, if Smith wants to say "I do" in Las Vegas, Bartha, who most recently reprised the role of Doug in The Hangover Part III, probably wouldn't say no.

    "The movie hasn't ruined Vegas," he told E! News at the film's premiere last night in L.A. "The movies kind of breathed new life into Vegas in a weird way. I'll always have a special part in my heart for Vegas."

    Aw! Let us know when it's time to assemble the Wolfpack again.

    —Reporting by Brett Malec

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