The 'Everybody In Love' star and his wife Chloe Gill welcomed their first child, a baby boy, into the world on Friday, 19 September. Aww!
JB shared his exciting baby news via Twitter on Tuesday afternoon, writing: "A little nose, lots of hair and looking like his mummy, our baby boy was born 19/09/14 weighing 6lbs 15oz."
He added the hashtags "super mummy" and "proud daddy."
So far, JB hasn't revealed the tot's name or any pictures. Come on! We can't wait to find out!
JB and Chloe announced their first pregnancy in June, just a month after marrying at a romantic ceremony in Scotland. The couple have been together six years.
JB told Reveal ahead of his son's birth: "It's an exciting time for us both and we're looking forward to it, It's going to be a big moment for Chloe… we haven't found out what we're having so it's going to be an incredible day, to say the least."
He said of choosing not to find out the sex or plan baby names in advance: "We didn't want to go overboard in our preparations so we haven't got a nursery ready yet.
"We just wanted to wait and celebrate with our family when it happens."
JB's son was born nearly a month after bandmate Oritse Williams became a dad for the first time. Oritse and girlfriend AJ Azari welcomed their son, Omré , on 24 August.
Fellow bandmate Marvin Humes is also a dad, sharing one-year-old daughter with Saturdays star wife Rochelle Humes.
Congrats to JB and Chloe!
Stars who welcomed babies in 2014:
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