Kaley Cuoco and Henry Cavill are dating, report says Kaley Cuoco and Henry Cavill are apparently having "a great time" getting to know one another. Kaley Cuoco, who plays Penny on CBS' hit sitcom, "The Big Bang Theory," is reportedly dating British heartthrob, Henry Cavill, who helped bring Superman back to life with this summer's "Man of Steel." "They were both single and started dating recently," a source close to the new couple told People on Monday. "It's just the beginning stages of a relationship and they're having a great time," the source added. "They are totally hot for each other," another source told US Weekly. Cuoco is obviously a fan of Cavill's film work. The actress tweeted a photo of herself alongside a "Man of Steel" poster last month. But if it's true that the two have started dating, it may be a while before we get an official confirmation. News points out, Cuoco dated her "Big Bang" co-star Johnny Galecki for two years in secret. "It was a wonderful relationship but we never spoke a word about it and never went anywhere together," the actress told CBS Watch! magazine.