Gossip Girl star Michelle Trachtenberg fainted at the Gen Art Styles Fashion Show, STAR reports.

Michelle Trachtenberg faints at the Gen Art Styles Fashion Show

The incident took place at Sunglass Hut in Manhattan's Soho neighborhood. An eyewitness standing next to the actress at the time tells Star, "One minute Michelle was talking, and the next thing I know I hear a thump and Michelle was on the ground. It was really freaky."

Michelle's agent and publicist were standing next to her when Michelle blacked out and immediately jumped to her aide.

"Michelle drank both beverages and hate half of the basket.... Michelle kept saying was she has no idea what caused her to faint, especially because she only [fainted] one other time many years ago."

"Michelle was really cool about the incident and was smiling a few minutes after it happened," another source tells Star .

Image WENN