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Once upon a time ... there was a hugely popular TV show that was equally successful at spawning new couples!

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First, Ginnifer Goodwin found her Prince Charming (literally and figuratively) in Once Upon A Time love interest Josh Dallas, and now Jennifer Morrison has stepped out with Sebastian Stan, fueling rumors they too are now attempting to live happily ever after.

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Of Sebastian, who played The Mad Hatter in three episodes during the drama's freshman season, Jennifer said in March, "He's such an extraordinary actor. It was so great coming to work with him every day."

Jennifer, who was previously engaged to her House co-star Jesse Spencer in 2006, recently split with Prison Break star Amaury Nolasco.