Congrats are in order for Criminal Minds actress AJ Cook this evening, with the news that she has become a mum for the second time.

AJ, who plays Jennifer "JJ" Jareau on the popular crime drama, welcomed her second son in the early hours of this morning, her rep confirmed to Us Weekly today. The little one, who was born weighing 7lbs 6oz, is named Phoenix Sky Andersen.

AJ and her husband Nathan Andersen are also parents to a six-year-old son, Mekhai Allan.

Phoenix's arrival bears special significance for AJ, who celebrated her 37th birthday just yesterday. Celebrations were pretty low-key, as it is be expected considering AJ was preparing to give birth, but her husband made sure to bring her an extra special treat all the same… her favourite fast food.

"Took Alexander out for a fancy birthday meal," Nathan wrote, posting a picture of a bag of food from iconic burger chain In-N-Out on Instagram.

Nathan and AJ announced they were expecting back in March, calling their second pregnancy a "miracle" and a "blessing".

 

Miracles do happen and don't believe anyone who tells you otherwise. #blessed #bump

A photo posted by @ajcook on Mar 1, 2015 at 1:46pm PST

The expectant parents even revealed their baby's gender that same day, with Nathan taking to social media to say, "Since @ajcook announced we are expecting a new addition to the clan, I guess it's my responsibility to inform everyone it's a boy!"

We can't wait to see a first snap.