The loved up couple have previously been open about their struggle to conceive naturally, however, they announced the they were expecting their second baby last November, after undergoing IVF.
She has yet to reveal any further details about the baby's name or birth weight, while husband John Legend hasn't publicly commented on the tot's arrival as yet.
Congrats John and Chrissy - we can't wait to see the first pictures of your lil man!
However, the couple have also been concerned about how well their daughter Luna, two, would adapt to having a sibling. "Wanna hold my boy let's do thisssssss". "It feels worse for me because with IVF you know *so* early", she shared.
Venting her frustration on Twitter, she shared: "Happy pregnant Chrissy is gone. meet OVER IT Chrissy". The parents have previously said that they are expecting a boy.More news: Mercedes can now put pressure on Ferrari - Hamilton
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Congratulations to the second-time parents!
Lucky for Chrissy, the little boy chose to arrive early as her due date was not until June and it was only a week ago that she declared she was "over" being pregnant.
John said: "Luna's gonna be an issue".
The couple married in 2013.