Her parents split up when she was four and her mum married Paul Price, a fencing firm owner, who gave Katie his surname.
She has an older brother named Daniel, who looks after her website, and a younger half sister, Sophie, who is also a model.
When she was 16 a friend suggested she have some photographs done. To her surprise, the London agency to which she sent them liked them and signed her up.
The agency came up with the stage name Jordan and she soon started appearing in The Sun and men's lifestyle magazines, becoming one of Britain's best-known models.