"So excited to tell you that Wayne & I are expecting another baby later this year," Frankie, 25, tweeted on 8 January. "We can't wait for Parker to have a little brother or sister."
Frankie and Wayne Bridge are expecting a little brother or sister for their son Parker
The star, who danced her way to the Strictly Come Dancing final last month, then revealed that severe morning sickness meant she wouldn't be able to take part in the show's upcoming tour.
"Sadly I'm really unwell with my pregnancy and won't be able to take part in the Strictly tour," she told fans. "I'm SO sorry. I was so looking forward to it."
Frankie also confirmed her news in an official statement that read, "Wayne and I are delighted to announce that we are expecting a second baby. It is very early days, but we couldn't be happier and Parker will make a wonderful big brother.
So excited to tell you that Wayne & I are expecting another baby later this year. We cant wait for Parker to have a little brother or sister— Francesca Bridge (@FrankieTheSats) January 8, 2015
"Although this is such an incredible time for us as a family, due to health reasons I am sadly unable to go on the Strictly tour as planned.
"I'm devastated that I'm missing out, as I loved Strictly so much and was so looking forward to joining everyone again in those fabulous arenas. Thanks for the warm messages I've already received, that are really appreciated."
It is thought that Frankie is suffering from Hyperemesis Gravidarum – the same severe morning sickness which affected the Duchess of Cambridge in both her pregnancies.
Among the first to congratulate Frankie on her pregnancy were her Saturdays bandmates. Rochelle Humes – mum to 20-month-old Alaia – wrote, “Big congratulations to @FrankieTheSats and Wayne who have another #BabyBridge on the way,” while Vanessa White tweeted, “So happy and excited for @FrankieTheSats and Wayne on expecting baby number 2!! Xxx.”
Mollie King joked, "Haven't you two got a TV @FrankieTheSats!! So so happy for you, Wayney and little Parker! Xxx."
Frankie isn't the only member of the band pregnant with her second child; Una Foden – mum to Aoife Belle - is due to welcome a baby boy with her husband Ben Foden next month. She wrote, "Congratulations to @FrankieTheSats and Wayne who are expecting their 2nd baby later this year xx."