"Before leaving the party at 1:30 a.m., Kirsten and Garrett stopped to make out in the middle of the bar," one onlooker says. "He put his arm around her and then she pulled back and then they kissed again."
A second eyewitness adds that "they were dancing to Sam Ronson's set and stayed on the dance floor most of the time."
Despite their affectionate outing, don't expect the couple to make any red carpet appearances in the near future. "They have hung out and they hook up, but it's nothing serious," a source told Us in December. "They're having fun and keeping it simple and open. That's it."
Tell Us: Would Kirsten and Garrett make a cute couple?