Hayden Panettiere and Kaley Cuoco
01/14/2013 AT 10:45 AM EST
Just bust a move!
At the 14th Annual Warner Bros. and InStyle Golden Globes
afterparty on Sunday, The Big Bang Theory
star Kaley Cuoco
was anything but shy on the dance floor.
After running over to Hayden Panettiere
, the People's Choice Awards
host looked the Nashville
star up and down and exclaimed, "Gorgeous! Gorgeous!" about her blush, tiered strapless gown
, an onlooker tells PEOPLE.
Grabbing each other's hands, Cuoco and Panettiere were engulfed
in "animated conversation," but things got even more fun once the deejay played Madonna's "Like a Prayer."
Cuoco and pals hit the dance floor, where she clapped, swayed and "was twirled by a male," the source adds. Later when Bell Biv Devoe's 1990 hit "Poison" was played, Cuoco held up her long dress while showing off a few more moves.
The actress was dancing so much that she "left the party with her heels in hand!" the source adds.
– Dahvi Shira