The Splash star, 35, gave birth to a "perfect" baby boy on Monday (22 December).
Announcing the news on Twitter, TV presenter and singer Charlotte couldn't hide her joy at becoming a mummy - especially as the little fella kept her waiting for two weeks beyond her due date!
The Sky Sports star wrote: "I'm very proud to say our son arrived yesterday at 7pm - 2 weeks late and a big one 9lbs 10 and he's perfect!"
While the as yet unnamed tot was bigger than average, Charlotte already proved she had a high pain threshold when she reached the semi-finals of ITV's Splash, despite breaking a toe!
Fans were quick to congratulate the new mum, including fellow celebs.
TV presenter Angellica Bell gushed: "Congratulations lovely lady! So happy for you both xx."
While former Made In Chelsea's Ashley James said: "Congratulations darling :) best Christmas present xx."
I'm very proud to say our son arrived yesterday at 7pm- 2 weeks late and a big one 9lbs 10 and he's perfect!)— Charlotte Jackson (@CharLouJackson) December 23, 2014
The newborn is Charlotte's first child with Wales football manager Chris Coleman. He has two kids from a previous marriage.
The pair met in 2012 when Charlotte was presenting a golf competition in Portugal, and plan to marry in May 2015.
They revealed they were expecting a baby in June, when Charlotte tweeted: "Thanks for all the congratulations! We are very pleased and excited to be expecting a baby this year!!"
Congratulations to Charlotte and Chris!
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Celebrity couples who welcomed babies in 2014:
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