Hugh wrote: 'Our little man arrived this morning at 8.49am my beautiful wife @wonderwomanshel was amazing, I'm so proud of her. Both are doing great.'
And Michelle confirmed, writing: 'Thank you all so much for your well wishes..Mine & @hughhanley little boy is snuggled into us and we are the happiest parents ever..Xx'
It is thought Michelle gave birth via caesarean section.
The baby boy is the second child to be born to Hugh and Michelle, with them already having one-year-old daughter Faith.
Michelle has spoken openly about her worries that a second child may not be on the cards, after she revealed she would have her breasts and ovaries removed to recede the risk of her developing cancer.
The star discovered she had a heightened risk of developing both forms of cancer, and has already undergone and operation to remove both breasts.
Their son will be the couple's final biological child together - as Michelle has made the brave decision to have her ovaries removed after she'd had her second.
'I always pictured having one girl and one boy. I never imagine it any other way. Plus, I'd be risking my life if I had another baby.'
Congratulations, Michelle and Hugh!