The singer, who was up for two awards at the music prizegiving and performed with Carrie Underwood, and The Big Bang Theory star both attended a party at Hollywood's Hyde nightclub following the ceremony, and photographers snapped the two walking out of the venue, smiling and chatting with each other.

While it is unclear whether they both got in the same vehicle, sources tell the couple was sitting together in the VIP section of the club.

An insider also tells E! News, "It looked like they completely hit it off and were trying to downplay the flirtation as friendship but it was pretty undeniable. Kaley kept talking to him with her hand over her mouth."

Cuoco is back in the dating game after filing papers to end her 21-month marriage to tennis pro Ryan Sweeting in September (15).