Posted 28 minutes agoSubscribe to Screen Time NewsletterCaret Down22 Years After His Tragic Death, Kaley Cuoco Is Still Honoring Her "8 Simple Rules" Co-Star John RitterKaley was just 17 years old when her beloved co-star John died suddenly after falling ill on the set of "8 Simple Rules."by Stephanie SoteriouBuzzFeed StaffFacebookPinterestLink Kaley Cuoco was just 16 years old when she landed her breakout role on the ABC sitcom 8 Simple Rules, which starred John Ritter and Katey Sagal as Paul and Cate Hennessy, a married couple trying to navigate raising their three children.