Tom Cruise motorcycle mystery woman Gjelina katie holmes date Tom Cruise motorcycle mystery woman Gjelina katie holmes date

Um, who is this?!

Tom Cruise rode up to Gjelina in Santa Monica on Tuesday on his motorcycle, and he then met up with a mysterious brunette who gave him a rather affectionate smooch on the cheek!

Tom celebrated his 51st birthday on July 3, so either he's catching up with an old friend for a belated b-day lunch or those rumors of him being insanely jealous over Katie Holmes' alleged onscreen romance are true -- and he's getting back at her!