Modern Family costars Ty Burrell and Julie Bowen were attached at the hip on Sunday.
Fresh off of their Billboard Music Awards hosting duties, the two actors got the party started at Lily Bar & Lounge at the Bellagio in Las Vegas, where they were joined by a group of about 20 and danced for almost two hours.
"Ty and his wife Holly seemed like they were really enjoying their time together," an onlooker tells PEOPLE. "The group especially liked when the deejay put on a bunch of old-school beats. They had an area to themselves where they sipped on cocktails and hung out a little past midnight." – Dahvi Shira