A.J. Cook gave birth to another baby boy!

This is the second son for the 37-year-old "Criminal Minds" actress and her husband Nathan Andersen. Their new baby boy, Phoenix Sky Andersen, was born on Thursday July 23, just a day after Cook's birthday, at 7 pounds and 6 ounces, her rep has told Us Weekly. The two also have a 6-year-old son Mekhai Allan.

Cook originally announced that she was pregnant again back in March with an Instagram photo of her barely there baby bump. "Miracles do happen," she wrote. "And don't believe anyone who tells you otherwise. #blessed #bump." She's been keeping her followers updated on her growing baby bump as the months go on. Her most recent post was earlier this month over Fourth of July weekend as she and her husband, in tiny American flag shorts, posed on the beach holding some sodas.

At the time, Anderson posted to social media the same say, according to People. "Since [A.J.] announced we are expecting a new addition to the clan," he wrote. "I guess it's my responsibility to inform everyone it's a boy!"

Yesterday, Andersen posted a photo of himself face down in a hospital, joking around on how hard the whole birth thing was on him. "I'd like to thank Bilbo Baggins for loaning me his bed during my stay at the hospital," he captioned the photo.

Check out A.J. and her other beloved family member, her Yorkshire terrier Zara, HERE!

 I'd like to thank Bilbo Baggins for loaning me his bed during my stay in the hospital. Photo cred @ajcook #riseofthephoenix

A photo posted by Nathan Andersen (@nathanandy) on Jul 23, 2015 at 12:58pm PDT

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

Happy #bump...I mean, #hump day!! Less than halfway to go.... A photo posted by @ajcook on Mar 18, 2015 at 10:55am PDT