The couple have welcomed a baby boy named Cass Mac, with the proud mum taking to social media to announce the exciting news.
Former Manchester United star Wayne Rooney has become a dad for the fourth time.
Sharing a snap of herself staring lovingly at her newborn on Instagram, Coleen wrote underneath: "So Happy to welcome our Baby Boy".
Colleen made the announcement on Twitter in the early hours of this morning, revealing that Cass Mac Rooney was born weighing 8lb 10oz.
The 31-year-old told her fans on Twitter that Cass Mac Rooney - sibling to Kai, Klay and Kit, whose names all began with the letter K - was "beautiful".
While expecting her third child, Kit, Coleen previously said she'd like a baby girl, telling HELLO!
The Rooneys personal lives has come under increased scrutiny in recent months as the Everton footballer (32) was revealed to have been three times the legal drink drive limit while at the wheel of another woman's vehicle following a night out past year. "If I didn't then I wouldn't be trying to make it work".