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These on-screen couples also dated in real life

By promipool.com of Promipool | Slide 1 of 15: "Penny" and "Leonard" from The Big Bang Theory did not only hook up on-screen, but fell in love in real life as well. However, Kaley Cuoco and Johnny Galecki kept their relationship a secret until they separated in 2010. Johnny is now dating Ariella Nicole, while Kaley is engaged to Karl Cook.

Kaley Cuoco and Johnny Galecki

"Penny" and "Leonard" from The Big Bang Theory did not only hook up on-screen, but fell in love in real life as well. However, Kaley Cuoco and Johnny Galecki kept their relationship a secret until they separated in 2010. Johnny is now dating Ariella Nicole, while Kaley is engaged to Karl Cook. 

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