The mother-of-five went into labour two weeks early on Monday afternoon with her and 27-year-old Kieran's second child together.
READ: KATIE PRICE ADMITS KIERAN HAYLER AFFAIR WITH SECOND FRIEND CHRISSY THOMAS
Now Katie, 36, is said to be hoping that the arrival of their bundle of joy will help cheating Kieran 'see the light.'
A source told The Sun: "He was dressed in scrubs for the operation and loved it. She joked that the last time he was in clothes like that was for a stripping routine."
READ: KATIE PRICE SAYS SHE'LL NEVER FORGIVE KIERAN HAYLER OR 'SCUM' JANE POUNTNEY FOR AFFAIR
The birth of their daughter comes after Katie revealed in May that Kieran had been having an affair with her 'close friend' 49-year-old Jane Pountney.
Last month Katie also claimed that he'd been having an affair with another of her friends, Chrissy Thomas, at the same time.
Despite everything though, Katie confirmed this week that she and Kieran are back together and working through their problems.
READ: KATIE PRICE SET TO 'LAUNCH LINE OF SEX TOYS'
She told a British magazine: "I wanted to focus on having a healthy baby rather than ending another marriage, so I decided that I would have our child and help Kieran through his therapy."
Yesterday Katie shared the first picture of her baby daughter: an adorable snap of her clutching Kieran's finger. She captioned it: "Daddy's little girl :)"
Katie is also mum to sons Harvey, Junior and Jett and daughter Princess.