Natasha, who appeared in the January 2012 series of CBB, and her partner Mark Smith welcomed their baby into the world earlier this week.
The reality star, 31, has not yet confirmed the name of her little boy but she has posted two cute photographs of him on Instagram.
Alongside the snaps, Natasha - who famously had an affair with her brother-in-law, footballer Ryan Giggs - simply posted emojicons of little blue hearts.
Natasha is already mum to two sons, Louis and Liam, who she had with her ex-husband Rhodri Giggs, and kept fans updated online with her latest pregnancy.
Last month, Natasha showed off her baby bump while posing for a selfies at home.
Two weeks ago, before her expected due date, she also shared a picture of her bare tummy while outside in the garden. Alongside it, Natasha - who now uses her maiden name Lever - said: "3 Days Till D Day."
Unfortunately, it seems she had to wait a little longer than three days - but Natasha did get her bundle of joy in the end!
More celebrities who have welcomed babies in 2014:
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