Kaley Cuoco played Penny on "The Big Bang Theory," the pretty girl who befriends (and marries one of) the nerds who make up the show's cast. She was one of the hit sitcom's biggest breakout stars.

With his crippling shyness, selective mutism around women, and hilarious over-reliance ... As a core member of the original ...

From the mean streets of Los Angeles to the desolate desert of New Mexico, Cruz must contend with a brutal Russian boxer, three brash LAPD detectives, an aged billionaire looking for the Big Bang ...

While her full name has not been revealed throughout the series, Penny ends up taking the name Hofstadter after marrying Leonard.

While the show includes multiple main cast ... Big Bang Theory, Mrs Wolowitz initially had mixed feelings about Howard's relationship with Bernadette. Being an overprotective mother, she was skeptical ...