The 21-year-old Mean Girls star was seen drinking cocktails and chatting with friends into the early hours of Sunday morning at Times Square's "Hawaiian Tropic Zone" in New York.

Lohan accompanied her friend DJ Samantha to the club. A blond-haired Lohan stationed herself at a table directly behind Ronson's deejay booth in the second level VIP section, which overlooked a packed dance floor. Witnesses state that she was seen smoking cigarettes, chatting with friends, and sipping Grey Goose vodka with Red Bulls.

Saturday wasn't the first time Lohan has been spotted drinking post-rehab. In January, she was videotaped drinking champagne directly from the bottle while visiting Capri, Italy.

Lohan is currently working on a new movie based on the serial killer Charles Manson. Lindsay Lohan will portray one of the female cult followers that gravitated around Charles Manson at the time when he was young, apparently charming to certain people and capable of convincing his followers to do things for him.