Kaley Cuoco's boyfriend didn't know she was Penny on 'The Big Bang Theory

The Big Bang Theory is one of the most popular sitcoms of the last decade and came to an official end in 2018. The CBS sitcom ran for 12 seasons. Its main characters were renowned

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Surprising Revelation: Kaley Cuoco's Boyfriend Admits Being 'Completely in the Dark' About Her Iconic Big Bang Theory Role!

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