Cat Deeley was delighted to reveal that she is pregnant with her second child on Saturday night.
The TV host, 41, who had first child Milo in January 2016 with husband Patrick Kielty, 46, is expecting a new baby in the spring, after saying she was considered a 'geriatric mum' by doctors.
She told her fans on Twitter: 'Over-the-moon to share that Milo is going to be a big brother! Can't wait to be a family of four in the spring. We're all so excited.'
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Over the moon! Cat Deeley (here in September) has announced that she is pregnant with her second child
Last year, Deeley told how she wanted more children and that the pressure was on because of her age.
'I would love some more. But I have got to get on with it if I do,' she told the Daily Mirror.
'When you go for your check-ups they call you a "geriatric mum". That is the terminology they use, I swear.
Delighted: The mum-of-one made the announcement via Twitter on Saturday night
Happy couple: Cat wed husband Patrick (here together in 2015) wed in a secret ceremony in 2012, after working together on British T
'They say, "Ma'am, you are triple high risk'', the So You Think You Can Dance? presenter, who had Milo when she was 39, said.
Former CD:UK host Deeley and comedian Kielty married in a secret ceremony in Rome in 2012, having been long-time friends.
Kielty, from Northern Ireland, previously joked about having children with Brummie Deeley, saying: 'I hope any child we might have has Cat's looks and my accent.
'With our two strong accents, we basically needed subtitles or a UN translator.'
Cat is only recently back to Britain after soaring to success in the US, following her move in 2006.
Following her international move 11 years ago, Cat became the host of So You Think You Can Dance?
Expecting again: Cat welcomed her first child in January 2016
'I'm very excited to be home,' she said two months ago. 'I mean, I always consider the UK my home anyway, because my friends and family are here.
'It was actually really exciting to walk on to the floor as I knew loads of the crew from back in the SMTV and CD:UK days.'
She is back to host music reality contest Sing: Ultimate A Cappella having previously said that only two things would take her home: an amazing job or a huge pay cheque.
She told Grazia: 'The question isn't about leaving LA. It's about my little boy and my husband.
'And I was to going to leave them, it's either got to be something that drives me wild with excitement or something that pays me very well, if I'm being completely honest.'
Cat previously insisted that LA life hadn't changed her, adding: 'I mean, I do the green juice, I do yoga. But I've always don it - even in London.'
Throwback: Here in 2003 on Fame Academy, Cat and her husband were friends and colleagues before they wed