Fickle or flighty? Can we use those words to describe the Big Bang Theory actress Kaley Cuoco? Before she even reached 30, she had a whole series of broken relationships behind her. She dated her co-star Johnny Galecki on the QT for almost two years. But by 2011, she was engaged to addiction specialist Josh Resnik. That lasted less than five months and no explanation for the split was given. She then married tennis player Ryan Sweeting in December 2013. But in September 2015, she filed for divorce. She may be holding a torch for Johnny. Keep watching this one.