X17 XCLUSIVE - Linsday's Make-Out Mate ID'd!

Last night Lindsay Lohan enjoyed some PDA with a mystery dude at the in-store party at Church Boutique in West Hollywood, and now, we've ID'd the Lilo lip-locker as 29-year-old French actor Aurelien Wiik! Talk about a French kiss!

Wiik is a fairly well-known French actor and has only appeared in French films ... well, until X17 shot film of him last night!

His Twitter bio says he's a "French actor moving to LA" who loves "stand-up comedy", "sport" and "cute girls." Think he and Lilo are a match made in heaven?

Check out the steamy makeout sesh in the exclusive video below!