John Stamos is "crushing fatherhood", according to his former co-star Josh Peck.

John Stamos

John Stamos

The 55-year-old actor became a father for the first time five months ago when his wife Caitlin McHugh gave birth to their son Billy, and now his former 'Grandfathered' co-star Josh has heaped praise on the star for being an "incredible" parent.

Josh said: "Stamos is already crushing fatherhood. No joke. Can you imagine John Stamos changing a diaper? I mean, that baby is lucky. But his son, Billy, is gorgeous and if I can get anything quite like that, I'll be overpaid.

"He's done this incredible, beautiful transition into being a dad. And I know that he wanted to have a kid for so long. So to watch him sort of flourish in that way has been a joy."

The former 'Drake and Josh' star, 31, revealed last week he and his wife Paige O'Brien are also set to become first time parents, and has hinted he may even make John the tot's godfather.

Speaking to 'Entertainment Tonight', Josh added: "Maybe, you never know. Stamos as a godfather? Not bad. I'd want him looking out for my kid for the rest of his life."

Josh shared the news of Paige's pregnancy on social media last week, as he joked about having shed some weight alongside a professional picture of himself with his wife and her burgeoning bump.

He wrote on Twitter: "Guys I did it! I'm finally down to my goal weight! Oh and we're pregnant (sic)"

Before also adding on Instagram: "Oh baby. Literally, there's a baby in there. Love u @paigeobrienn @stormshoots (sic)"

Meanwhile, Paige took to her Instagram account to post a photo of her baby bump, and added the caption: "We're havin' a baby! (sic)"