These days, Kaley Cuoco is primarily known for playing Penny on "The Big Bang Theory." However, viewers who watched sitcoms in the early 2000s probably discovered her through ABC's "8 Simple Rules," ...
Before Kaley Cuoco was the outgoing neighbor Penny on "The Big Bang Theory," or the foul-mouthed, mallet-swinging anti-heroine in "Harley Quinn," she was the bubbly eldest daughter on "8 Simple Rules.