Whose Penny? Kaley Cuoco's fiancé Tom Pelphrey was clueless about The Big Bang Theory Kaley Cuoco's fiancé Tom Pelphrey had never watched her hit sitcom The Big Bang Theory when he first met her, and he still hasn't tuned in to the nerd culture celebrating comedy series. 13 February 2026 Kaley Cuoco's fiancé Tom Pelphrey has never watched her hit sitcom The Big Bang Theory.