Michael, 37, announced their exciting news on Twitter last night (27 August) and shared a cute picture taken moments after their son - called Noah - was born.
Luisana, 26, is lying down while cradling their baby as Michael - who is wearing hospital scrubs - looks on. Both are beaming at the camera.
Canadian singer Michael told fans: "Overjoyed and filled with gratitude at the arrival of our son."
Michael and Argentinian model Luisana knew they were having a boy after deciding to find out their baby's sex during the pregnancy.
Congratulations! And P.S. We're loving the pink mani Luisana. What a yummy mummy!
Check out who else has give birth this year in our gallery below:
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