Word on the street is that Drew Barrymore and Ed Westwick were spotted "in a full-on make-out session" at Kings of Leon show in New York City last night!!!

Drew and Ed started their make out sesh in the balcony of Webster Hall and then made their way to the Bowery and Fat Cat Billiards where they met up with Chace Crawford, Ellen Page and Emile Hersch.

 "Drew was hanging all over Ed!" a witness tells Us Weekly, denying more reports that she had also smooched Crawford. "They were full-on making out!"

The source also added, "They were definitely all over each other. It was on!"

Steamy!  But this isn't the first time the two have hooked up, apparently the two were locking lips at the SNL cast party last Saturday night.

At 33, Drew is 12 years Ed's senior; cougar style!  In my opinion Ed should feel honored that he's being romanced by the likes of Drew, she's a cool chick.  Do you think this is a hot fling or a sure thing?