Have Mercy! John Stamos is officially a father

"Full House" star John Stamos has welcomed his first child, a son, and he gave the newborn the perfect name.

Brittany King

Uncle Jesse is finally a dad! 


John Stamos and his wife Caitlin McHugh welcomed their first child together and announced the news via social media on early Monday morning. 


"From now on, the best part of me will always be my wife and my son," the Fuller House star wrote on Instagram alongside a stunning black and white photo of the newborn laying naked on his dad's chest.

It kills me that my parents arent here to be part of this, but I know it probably wouldnt be happening if they werent up there.

John Stamos

"Welcome Billy Stamos (named after my father)," the 54-year-old added. "#NotJustanUncleAnymore #Overjoyed."


"I've waited my whole life for this," Stamos recently gushed to ET. "I'm already so emotional and so excited... I've been dreaming about our baby. I mean, I am really excited."


The actor and 31-year-old McHugh married in February as his publicist says "Billy and Mom are both home and healthy."