Kaley Cuoco Wears an Enormous Engagement Ring Kaley Cuoco made a big announcement on the red carpet at Sunday's Golden Globes: The Big Bang Theory star told press she was engaged — then she took it back. After noticing a major sparkler on her ring finger, Ryan Seacrest asked the actress if she had any happy news to share: "I'd like you to know who I'm engaged to — Chopard, the jewelry designer."