Taking to social media, she tweeted: "Somebody's herrrrrrre!” along with a series of baby emojis.
Her second baby, a boy, joins 2-year-old big sister Luna Simone Stephens.
Chrissy shared the news she was pregnant in November by way of a hilarious video with the caption, "it's John's!" The video shows her asking Luna what's inside her tummy, with Luna answering, repeatedly, 'Baby.' Can we get an 'awwwwwww'?
The model, TV host and cookbook author said it previously took multiple rounds of IVF to conceive Luna and has spoken openly about experiencing postpartum depression.
Speaking to US Weekly in March, she gushed about preparing for her second child with John.
“I have a husband who truly loves the whole experience,” she said. “He holds my belly at night, sings to it, wants to be there for me. I’m really lucky because some men start to look at you like a tool, I’ve heard, so I’ve been scared and don’t let that happen to me! But it hasn’t and it’s really good.”
Congratulations to the happy couple - and let the adorable Instagram snaps roll in!