Just a few months after Tara Reid announced her engagement and marriage to Bulgarian financier Zack Kehayov, she's single again and moving on with a new man!

We spotted Reid planting a smooch on a mystery guy inside a car, after leaving the Grey Manor nightclub in LA.

The American Pie actress, who "tied the knot" on the beach in the Greek Isle of Santorini on August 13, admitted that her whirlwind marriage "was never legal” almost immediately after it began.

On to the next!