Published Friday, 14 March 2014
The McFly star's partner Giovanna welcomed the tot on Thursday evening.
Breaking the news to his fans on Twitter on Friday morning, Fletcher wrote: "Sorry for my Twitter silence over the last 24hrs (sic), I've been far too busy cuddling my son."
He added: "Yep, (my wife) gave birth to our insanely gorgeous son yesterday at 7pm. He is healthy, beautiful and I've already changed his nappy... And he's on his 3rd nappy. Full of poop, that's my boy!"
Fletcher has since received a slew of messages from his bandmates, congratulating him on the new arrival.
Dougie Poynter writes: "Congrats (sic) to (Tom) and g unit (Giovanna) on their brand spanking shiny new son," while Harry Judd adds: "Congratulations to (Tom and Giovanna) on the birth of there (sic) son. I will be meeting him in approximately 1.30 hours!! So excited!!"
Fletcher wed Giovanna in 2012.