But that doesn't mean the 27-year-old actress is starting a family anytime soon.
"I would like to make something very clear to anyone who cares. IAM NOT EFFING PREGNANT," the Big Bang Theory star tweeted Saturday. "Do with that what you will."
Sweeting proposed to Cuoco in September after three months of dating.
"By day two I was like, ‘Oh my god.' It was so unbelievable. I said, 'This is it, this is it,'" she has said of their relationship, telling Ellen DeGeneres last week that she knows her quickie engagement might seem "a little crazy to some people."