The former JLS singer has announced the birth of his first child - a son, with Sarah Lou Richards.
Sharing an adorable picture on Instagram, the singer posed with his newborn named Grayson Jax, swaddled in a white blanket, and revealed he was born yesterday
Revealing his son’s name, he captioned the picture: “Grayson Jax Merrygold 30/01/2018 @sarahlourichards life is now complete ❤”
Fans immediately flooded his page with congratulations.
One wrote: “Congratulations!! He’s gorgeous!! Wish you all the best in life❤️ he’s gonna grow up to be s handsome man just like his dad love you all?”
Another emotionally added: “crying actual tears ?????”
And a third fan gushed: “omg i have been waiting for this for so long, pretty sure i’ve been more excited about this than my own child x”
It’s been a blissful month for Aston, 29, who announced on Boxing Day that he and Sarah Lou, 33, are engaged.
He shared the happy news on Instagram, in a sweet post simply captioned: "Allow me to introduce you all to my fiancée?"
In the photo, Aston and Sarah Lou, 33, can be seen standing in a heart made of flower petals, with Sarah's hand showing off a diamond sparkler as she rests it on his chest.
The beaming star also changed his location to "on Cloud 9" after his other half accepted his proposal.
Aston met his fiancée back in 2012, when Sarah was working as a back-up dancer for JLS.
In September this year, the pair announced they were expecting their first child together, shortly before the start of Aston’s stint on Strictly Come Dancing.
At the time, Aston announced the news online as he wrote: "On May 29th 2017 we found out that our lives were going to change forever!
"This secret has been so hard to keep, but I'm so excited to finally be able to share the news with everybody that me and my beautiful lady @sarahlourichards are going to be parents!!!!!!”
The singer continued: "I'm NEVER speechless but words can't describe how I feel.. All I know is there's no feeling like it!
"Sar I promise to be the best daddy ever to our baby boy/girl.
"You are an amazing woman and going to be the greatest mum to our child!"
"Thank you for making me the happiest man ever. I love you. Hurry up bump, we can’t wait to meet you.”