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