Kaley Cuoco and Melissa Rauch had no choice but to become best friends — they portrayed the roles of Penny and Bernadette on the beloved sitcom "The Big Bang Theory" for the better part of a ...

American sitcom The Big Bang Theory centers around friends Leonard Hofstadter (Johnny Galecki), Sheldon Cooper (Jim Parsons), Penny Teller (Kaley Cuoco), Howard Wolowitz (Simon Helberg ...