Kaley Cuoco expecting second child.

The Big Bang Theory star announced she is pregnant with her second child with fiancé Tom Pelphrey. Cuoco shared the happy news on Instagram on Wednesday with photos of her baby bump. She also posed with Pelphrey and their three-year-old daughter Matilda, in front of a sprinkle-covered cake, and wrote, "It's a….". "Completing our little family, what a dream come true! This second time around journey has been a little windier in many ways, but wow, we are so grateful for this moment."