Una and rugby player husband Ben Foden announced this afternoon that they're expecting their second child together next year.
This will be the fourth Saturdays baby as Una is already mum to daughter Aoife, Rochelle Humes has daughter Alaia-Mai, one, and Frankie Bridge has son Parker, nearly one.
An excited Rochelle tweeted: "Big congrats to Una and Ben on bubba number two. Amazing news. Saturdays Juniors is forming nicely! #auntieagain."
Rochelle's husband Marvin added: "Another Saturdays baby on the way! Massive congrats to Una and Ben on the amazing news!"
Bandmate Vanessa White said: "Massive congratulations to Una and Ben. Such exciting news. I can't wait!"
Mollie King added: "So thrilled for you both @unathesats & @ben_foden. Foden family #BabyOnBoard."
Una, 32, announced her happy baby news via Instagram, saying she was putting the record straight after recent rumours of an impending arrival.
"I know lots of people have been guessing and Ben and I can now confirm that Aoife is going to have a baby brother or sister next year!" she wrote.
"We're all very happy!"
Una accompanied her Instagram message with a sweet picture of her little daughter Aoife, two, wearing a T-shirt declaring: "I'm going to be a big sister!"
Una made her pregnancy announcement the day after The Saturdays kicked off their 'Greatest Hits Tour' in Glasgow, Scotland. Their next scheduled date is in Newcastle tomorrow night.
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