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

Big Bang Theory' star Kaley Cuoco's partner was unaware of her TV fame until family 'kept' doing one thing

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Kaley Cuoco's boyfriend didn't know she starred in The Big Bang Theory until confusing family dinner