The Closer team were on high alert when Billi tweeted "So excited" with a baby emoji this morning.
And after what looks like a day-long labour, the TOWIE star announced the birth of her little boy on Twitter this evening.
"Welcome To The World Our Beautiful Baby Boy  @AndyTCarroll," the 26-year-old tweeted.
Father-of-three Andy, 26, also posted a photo of the happy family on Instagram, gushing: 'Welcome To The World Little AC!! 9 Months Of Cooking And What A Wonderful Job You Have Done @billimucklow.'
And judging by Andy's 'little AC' comment, it looks like the little one's name will start with A just like his dad.
Andy also has two children, daughter Emilie Rose, five, and son Lucas, three, from previous relationships.
Congratulations on the new addition guys!