On some lucky guy, that is. If this is real. Which we doubt.

The celebrity gossip rumor mill is swirling this morning with talk of a Kristin Davis sex tape. The Sex and the City actress, 45, certainly would make a superior sex tape star than, say, Gene Simmons. But there's no way it's legit, is there?

Take a look at this alleged Kristin Davis sex tape still photo and you tell us ...

Some sites claim that the Kristin Davis sex tape (featuring unknown guy) is being shopped around and that there's more photos of her on some pay site.

No reports of the tape's legitimacy have been found, however. Until we've got something to go on, we'll assume (hope) this isn't Kristin Davis.

You never know, though. Might this be a glimpse at Charlotte York's actions in the Sex and the City movie? We'll have to wait and see, people.

We'll keep you posted on this developing story.