The Big Bang Theory star Kaley Cuoco is set for a big day after becoming engaged to tennis ace Ryan Sweeting. A representative for the actress tells Us Weekly the news is for real and her client is thrilled. A source tells the magazine, "It's only been three months but she knows Ryan is the one." Sweeting reportedly proposed on Wednesday (26Sep13), just days after the couple made its red carpet debut at a pre-Emmys party in Hollywood. They also attended Sunday's (22Sep13) awards ceremony hand in hand. Cuoco was previously engaged to speech therapist Josh Rusnik and she has also dated British actor Henry Cavill and her The Big Bang Theory co-star Johnny Galecki.