Stella, who won the BBC reality show back in 2010, and her boyfriend, snooker player Ali Carter, confirmed that they were expecting by making an appearance at World Snooker Dinner And Awards at London's Dorchester Hotel, with Stella displaying a noticeable bump.
The happy news is even more poignant for the couple as Ali had previously battled two bouts of cancer, including testicular cancer, in 2013.
Speaking to MailOnline at the event, the father-to-be said: 'After all I've been through I can't believe my luck. Stella's been a positive influence on and off the (snooker) table. I'm back in the top sixteen and looking forward to welcoming our little bundle in the next few weeks. We couldn't be happier!'
Stella echoed his sentiment, adding: 'What with Ali being diagnosed with testicular cancer in 2013 and a month later being diagnosed with lung cancer its just fantastic for him - and me!'
Stella pictured with her sons Edward and Frank
Rumours of the pair's relationship emerged in May 2016, when a source told The Sunday People: 'Ali has been seeing Stella for a little while now, and things are going really well so far. They've been hanging out at her place down in Kent, and their friends know how happy they both are.'
'It's great news for both of them - they're lovely people and seem to have found real happiness.'
An onlooker at the previous year's World Snooker Dinner and Awards also said: 'They were obviously having fun - they were very tactile and playful, laughing giggling, and playing up to the cameras when they were spotted.'
Both Ali and Stella have children from previous relationships; Stella is mum to sons Frank and Edward, with ex Ray Dwyer, whilst Ali and his former partner Sarah share a son named Max.
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