'Big Bang Theory' Star Kaley Cuoco Dating Superman Henry Cavill: Is Co-Star And Ex-Boyfriend Johnny Galecki Jealous?

As "The Big Bang Theory" rolls into its seventh season, female lead Kaley Cuoco is being reported to be dating "Man of Steel" actor Henry Cavill, a major contrast to her former flame and CBS sitcom co-star Johnny Galecki.

According to the Daily Mail, the couple is "totally hot for each other" after splitting from their respective mates.

Superman recently left "Fast & Furious" actress Gina Carano, while Cuoco is moving on from musician Bret Bollinger.

The 30-year-old actor is reportedly a "massive 'The Big Bang Theory' fan" too, according to Celebuzz.

So how does Johnny Galecki aka Leonard Hofstader feel about all this?

Previously, Cuoco and Galecki managed to keep their relationship a secret for nearly two years before making their romance public after they had broken up.

On "The Big Bang Theory," Leonard and Penny (played by Cuoco) famously have an on-again, off-again relationship, which is going much stronger than their real-life counterparts' long-abandoned one.

In talking about Leonard and Penny, executive producer Bill Prady tells The Huffington Post that they have "come to a good place for the moment, so I think maybe they'll get to be happy for a little while."

"Penny telling Leonard she loves him is pretty big. We didn't play it as a watershed moment. It was played as if she's always known this. It was touching."

With all this on-screen romance and off-screen history, hopefully Henry Cavill doesn't get too jealous!