After becoming a first-time dad, John Stamos can't stop gushing about his baby son, Billy. John and his wife, Caitlin McHugh, previously welcomed Billy into the world two months ago and the baby boy has since made quite a splash on John's Instagram page.

On Thursday, June 14, John shared the cutest selfie of himself and his new baby. While planting a sweet kiss on Billy's forehead, John stared into the camera with more than adoration in his eyes. "Look at my son, pride is not the word I'm looking for," John captioned the pic. "There is so much more inside me now. When you smile, I fall apart."

The Fuller House star continued, "Listening to "Dear Theodosia," Goosebumps/Tears. Damn you, #LinManuelMiranda. Your message is more needed now than ever. Your genius is time-released!" John already loves being a parent so much that he can't wait to have more kids. Even though it's been only a couple of months since Billy was born, Caitlin has also admitted she's ready to welcome another child very soon — and next time, she's hoping for a baby girl.

"I would love to give him a little girl," the actress recently told Entertainment Tonight. "He comes so naturally to fatherhood and I love watching it. I stare at the both of them all the time. [John is] 100 percent full-on active and fantastic… He's perfect, he's a perfect father. I can't wait to give him more [kids]."

This Sunday, June 17, John plans on celebrating Father's Day thinking of his own dad and his new baby boy. "I’ve been writing Billy a letter that I’m putting away for him to read when he’s 18. I’ll probably continue writing that, and I’ll certainly try to honor my father," he recently revealed to People. This will be John's first Father's Day with his son and we can't wait to see all the heartwarming pics to come!