Kerry gave birth to their daughters last Friday (17 January) and Scott has now announced the exciting news to his followers.
Taking to Twitter, the Big Reunion star said he and Kerry "couldn't be happier", while their sons "absolutely love" the new additions to their family.
Scott revealed: "Just to let everyone know @Kerry_lou83 gave birth to our beautiful twin girls on Friday.
"Kerry was absolutely amazing and so are the twins. @Kerry_lou83 and I couldn't be any happier if we tried. Brennan and Kavan absolutely love their baby sisters xxxxxx"
In September, Scott announced that Kerry was pregnant with twins, adding that they were conceived during 'The Big Reunion UK Tour'!
Speaking at the time, he added: "We've got to get a seven seater car and might have to move house but we're over the moon!"
Scott's not the only 5ive star currently turning his attentions away from showbiz and singing to nappies and night feeds.
Last week, we revealed how Sean Conlon is also expecting his first baby with his wife.
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