Sean Penn and Petra Nemcova have fueled rumors they are a couple after they were spotted enjoying a date at U2 rocker Bono's birthday party in New York on Thursday night.

Nemcova and Penn were originally linked in 2008, but reportedly rekindled their romance after the model broke off her engagement to British actor Jamie Belman in April.

And they refused to hide their affection for each other at a party for Bono's 52nd birthday at The Spotted Pig in the Big Apple.

According to New York Post gossip column Page Six, the two were "very much" together as they partied with Jay-Z, Anna Wintour and Christy Turlington.