The picture was captioned, "The Tin Man, Dorothy and The Scarecrow say hi to the cutest of Munchkins". Stamos, holding his one-month old son, is proudly showing his Full House family his newest addition.
Lori Loughlin and Bob Saget can be seen staring in wonder at baby Billy. The infant is rocking a onesie that says, "Jesse and the Rippers" - a throwback to the band that "Uncle Jesse" used to play in. This is seriously hitting us right in the feels.
This is the first child for Stamos and his wife, Caitlin McHugh. The couple were married on February 3rd in Studio City, a mere two months before the birth of their baby. The bride looked radiant in a princess-cut white gown, her long brown hair pulled loosely to the side.
PREVIOUSLY: JOHN STAMOS AND CAITLIN MCHUGH WELCOME BABY BOY
Stamos asked McHugh to marry him at Disneyland. Good Morning America reported that Stamos "... put together some of the most romantic moments from Disney and Pixar animation [in a video] and then he ended it with Sebastian from The Little Mermaid saying, ‘Just ask the girl’ to John”. Could this be any cuter?
Many fans assumed that Stamos would remain an eligible bachelor for life. The 54-year-old actor showed little signs of settling down before meeting his wife, though he did seem open to the idea of children...eventually.
“When the time is right, it’ll happen," Stamos told PEOPLE in 2015. "This year has been about clearing my head, being healthy and getting my career on track. I think everything will fall into place as long as I’m good, solid and spiritual”.
Stamos's life in the spotlight was not always so happy. In fact, he has faced many hardships throughout his decades-long career. In 2015 the actor was charged with a DUI after he was pulled over for driving erratically in Beverly Hills. Shortly after, Stamos entered a rehab facility that specialized in the treatment of substance abuse.
Perhaps the stars aligned for Stamos because as of now, his life has changed dramatically. The beloved sitcom star seems nothing but ecstatic about his marriage and the birth of his son.
"It's more beautiful than I imagined," Stamos told ET. "Everything is more colorful, more exciting. Music, you know, sounds better. He's just a beautiful little boy".
Congrats Uncle Jesse - best wishes to your growing family!