The model welcomed a son, Jett Riviera, last week after a traumatic birth at a foreign hospital, but she hasn't let the bad experience put her off the idea of having any more children.
She told The Sun: "We’ve been through a nightmare, but it’s made me and Kieran so much stronger and we can’t wait to have another baby."
Jett - who is Katie's first child with third husband Kieran Hayler - was born eight-weeks early and still remains in hospital, while Katie was discharged on Friday.
Taking to Twitter for the first time since giving birth, she wrote: "Finally in a state to tweet thank you for everyone's amazing support and messages! I love @kieran0322 and our amazing baby boy jett. #jett."
Katie has three other children, 11-year-old Harvey with footballer Dwight Yorke and Junior, 8, and Princess, 6, both with ex-husband Peter Andre.