Simon Thomas has announced the early arrival of his newborn daughter with his wife Derrina, who went into labour eight weeks early.
The former Blue Peter presenter, 49, shared the news of his daughter's arrival on Instagram as he shared a series of images documenting the birth on his Instagram.
Simon shared four photos with his 102,000 followers; one showing his wife shortly after the arrival of their newborn.
In the image Derrina is in a hospital gown and on an operating table as the tot is wrapped in a towel nearby her.
A second photo shows a close-up view of the couple's baby daughter, who weighed just over 3lbs at birth, while a third sees Simon's son Ethan looking at his newborn sister, who is in an incubator.
The final image sees 12-year-old Ethan holding his step mum Derrina's hand as she lays in a hospital bed.
In the caption, Simon opened up on his 31-year-old wife's health and daughter's early arrival – which comes a month after the couple announced Derrina was expecting.
He wrote: "Not everything in life goes quite according to plan. One moment we think we’ve got eight weeks until our little one arrives; the next, after Derrina fell rapidly ill, we’re suddenly welcoming into the world a very tiny, but hugely precious baby girl weighing just over three pounds.
"The #neonatal team at #stokemandeville hospital were simply incredible and held our hands physically and in spirit the whole way through a very fear filled and stressful day yesterday.
"I cannot express how proud and blessed I feel right now - I have a beautiful, brave wife in @derrina , a precious son and now a tiny, wonderful daughter and sister for our boy Ethan."
Former Sky Sports presenter Simon added: "We have a long road ahead of being in hospital for the next few weeks; but we have the best team around us.
"Thank you Stoke Mandeville and thank you #nhs for being there for us and thank you God for blessing us as a family so much."
The couple are yet to confirm the name they have chosen for their daughter.
Simon and Derrina, who married last year, were quickly flooded with supportive messages and comments to congratulate the couple and send well wishes.
Simon's former Blue Peter co-presenter Matt Baker wrote: "Sending lots of love to you all X".
While a fan penned: "Congratulations. Praying that everyone is well and receiving the care and love they need. God bless you all x".
As another added: "Congratulations firstly on becoming a family of 4! Wishing baby girl and @derrina a speedy recovery! Xx".
Hours before announcing his daughter's arrival, Simon posted a black and white photo of himself and his wife cuddling on his Instagram story.
Hinting at Derrina's health woes, he penned below: "All I want to say tonight is thank you #NHS thank you for just being amazing to us today".
Simon and Derrina tied the knot last year, four years after the tragic passing of Simon's first wife Gemma.
Gemma Thomas died just three days after she was first told she was suffering from a rare blood disease in 2017 – after being told she was suffering from stress by a GP.
