Kaley Cuoco and Johnny Galecki's off-screen romance was a well-kept secret, hidden even from their Big Bang Theory co-stars.
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The Big Bang Theory featured several romantic storylines on screen, but behind the scenes, Kaley Cuoco and Johnny Galecki had their own well-kept secret. The duo, who played on-again, off-again couple Leonard and Penny on the show, were dating in real life but wanted to keep their romance a secret.
They established a rather unique way of continuing to see each other and also not getting caught by the hit commission cast and crew.
Leonard and Penny's relationship on The Big Bang Theory had several ups and downs in the sitcom. But despite this, not only did they get married, but the ending also revealed that the duo were expecting their first child together. While this was the story on screen, behind the scenes, Kaley Cuoco and Johnny Galecki kept a romantic secret to themselves.
