Mischa Barton was left spooked during her Halloween festivities last weekend after a fellow clubgoer threw a drink over her.

The former O.C. actress was partying in New York on All Hallows' Eve when she was soaked by a man who claimed the star had trodden on his foot.

According to RadarOnline.com, the actress retaliated by dousing the rude reveller with her own beverage.

But the upset didn't stop there - the website claims Barton's protective pal approached the guy and the confrontation turned nasty, with the pair brawling in the bar.

A source tells the site the man was eventually ejected from the venue with a "a gash to his head and his knee was all cut up".

A rep for the actress has refused to comment on the reports.