Hayden Panettiere -- Proof She's Banging Wladimir Klitschko ... Kind Of

Hayden Panettiere is soooo banging her ex-boyfriend Wladimir Klitschko -- just like we predicted weeks ago -- and TMZ finally has the rock-solid proof we've been waiting for ... sort of.

You'll recall, we talked to Hayden back in January at LAX -- where she insisted she and the 6'6" Ukrainian boxing champ were "just good buddies." But we had a hunch it was MUCH more than that.

And now we have the PROOF (kind of) ... because photos were snapped yesterday in Hollywood, Florida ... where the probably-back-together couple was seen cuddling on a couch at Taco Beach Shack.

Specifically in the pics ... Hayden is all smiles (and lookin' super hot) while holding Wlad's hand ... his arm is wrapped tightly around her body ... and there's obvious sexual tension.