In news that would have the characters on 'The Big Bang Theory' salivating, Kaley Cuoco (who plays hot girl-next-door Penny on the hit sitcom) is dating Hollywood's newest Superman, Henry Cavill.

It's a match made in nerd heaven. Aka Comic Con.

"They are totally hot for each other," a pal revealed to Us Weekly. Said yet another source, Cavill is "a massive 'Big Bang Theory' fan" and "has always wanted to date her."

The couple have been decidedly hush-hush about their relationship, but in a now-telling tweet from a couple weeks ago, Cuoco revealed that she loved the new 'Superman' and you should too -- and to prove it, she included a snap of herself drooling lovingly at a promotional photo of the guy we now know is her new man.

Her missive included the commentary, "Everyone go see 'man of steel.' It's fantastic in every single way."

What we're saying is last month you got trolled by Penny ... and you didn't even know it.

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