Family Shocker?: Kaley Cuoco is William Shatner's secret daughter...in a new Priceline commercial. In the clip, the Big Bang Theory star surprises her unknowning dad and is ready to join in the family business. The Star Trek star tweeted that Cuoco is "a wonderfully talented and beautiful actress." The 27-year-old blond beauty said of the new ads, "The nerdy factor, the Trekkie stuff, it goes with Big Bang and it all worked together."