JJ Hamblett of Union J and his girlfriend Caterina Lopez have welcomed their first child, a baby boy named Princeton J. Alexander. Congrats!

‘Its official at 9 30am today I became a Daddy The healthy little boy has arrived at a weight of 6lb!!!!! soooo happy right now :)))) xx,’ JJ said on Twitter announcing the news to his fans.

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Fellow bandmates Josh Cuthbert, 21; Jaymi Hensley, 23, and 20-year-old George Shelley were quick to add their congratulations to their bandmate.

‘JJ is a Dad whoooop uncle Jaymi xxx,’ Hensely excitedly told his followers, while Cuthbert said: ‘IM GONNA BE AN UNCLE :D

Meanwhile Shelley was excited to no longer be the youngest member of their group. ‘Congratulations JJ and Cat! New little one in the family now so proud of you both! I’m not the youngest member anymore!! Haha Love You!’

Sending huge congrats! JJ will be one hell of a DILF!