Two to tango.

Is Mario Lopez steppin’ out with his Dancing with the Stars partner Karina Smirnoff? An unidentified source seems to think so and kindly shared their observations with Us Weekly Magazine (http://www.usmagazine.com/node/2263).

"It’s serious," the source claims, adding that the two have been going toe-to-toe since August.

Mario, who will really always be Saved by the Bell’s Slater, has been featured in hours of mindless programming including Pacific Blue, daytime chat fest The Other Half and Animal Planet’s Pet Star. Karina, according to information provided by Dancing, has been ballroom dancing since the age of nine and is a five-time U.S. National Champion, a World Trophy Champion and an Asian Open Champion. Sounds like a match made in mambo.