The singer's husband, British model and filmmaker Max Rogers, shared the happy news on Friday, October 11.
"Happy to announce that @KimberlyKWyatt gave birth this afternoon...," he wrote on Twitter. "Mum & baby are doing very well. Looking forward to sharing all the details in a few weeks,for now we will switch off and welcome the new arrival to our family. My wife is incredible..."
Wyatt welcomed their new addition via Caesarean section and shared a picture of her baby bump before the surgery.
"Saying goodbye to my baby bump!... See you on the other side," she wrote on the social media site.
The couple wed in 2013 and already shares daughters Willow and Maple.