It's a boy for A.J. Cook and her husband, Nathan Andersen!

The Criminal Minds star, 37, gave birth to the couple's second baby, a son named Phoenix Sky Andersen, on Thursday, July 23, her rep confirmed to People.

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Mother and son. 💕

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Little Phoenix — who weighed 7 lbs., 6 oz., and measured 20.5 inches — joins older brother Mekhai Allan Andersen, 6.

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A.J. and her husband, Nathan, married in August 2001 and welcomed Mekhai in September 2008. The pair announced their second pregnancy in March on Instagram.

"Miracles do happen and don't believe anyone who tells you otherwise. #blessed #bump," the actress captioned a pic of her showing off her baby bump.

Congratulations to the happy couple on their new addition!