(Cover) - EN Showbiz - Dianna Agron reportedly couldn't stop kissing new boyfriend Sebastian Stan at a recent New York party.

The 25-year-old actress-and-singer plays Quinn Fabray on hit US musical comedy show Glee, and has been linked to handsome actor Sebastian, 27, of late.

The celebrities both enjoyed a night-out on Tuesday at swanky Big Apple rooftop lounge PH-D at the Dream Downtown.

Spies told the New York Post that the pair danced the night away, with stunning Dianna "kissing Sebastian off and on throughout the night".

Sebastian is known for playing Carter Baizen on American teen drama Gossip Girl, and another star of the programme, Jessica Szohr joined in the party. The gorgeous actress, who plays Vanessa Abrams, was seen hanging out in a booth with her pals until 2am.

Dianna has previously dated British actor-and-model Alex Pettyfer, although they split back in February. According to reports, Alex had accused Sebastian of "hooking up" with Dianna. Sebastian was formerly in a relationship with Gossip Girl's Leighton Meester, although they split in April last year. (C) Cover Media