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.

Jason Ritter is still close with his late dad John Ritter‘s 8 Simple Rules costars. “I see them all the time,” the Matlock ...