Hot Gossip About Gossip Girl Co-Stars!

 Image by wenn.com

Blake Lively and Penn Badgley have been playing it cool for a while now, pretending they're not a couple. But they were finally busted!

The two co-starring love birds headed south of the border to Paraiso de la Bonita in Mexico's Mayan Riviera this past weekend. 

There are even pics of Blake and Penn kissing, holding hands, applying sunblock, the whole nine yards.  Hope it works out! Breakups on a TV show never go over too well.