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Chloe Sevigny, Jason Segel

Kristian Dowling/Getty Images

Is a romance brewing between How I Met Your Mother's Jason Segel, 29, and 34-year-old Big Love star Chloe Sevigny?

The duo was looking awfully cozy at last night's HBO Emmys party in West Hollywood...

At about midnight, Segel and Sevigny were spotted kissing in a corner of the party away from the main bar area. They stopped locking lips once they realized people were watching them.

While we don't know if the maybe-couple shared the same ride home, they did head out of the party side-by-side, shortly after their smooch sesh was noticed.

Reps for both stars declined to comment on their clients' personal lives.

—Reporting by Dahvi Shira

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Can't get enough of your fav celebs hooking up? Check out our Romance photo galleries for all of the spit-swappin' scoop.