The 31-year-old model has announced that she is pregnant with her first child with her rugby player boyfriend Thom Evans and revealed that she already knows the sex of the baby.
She wrote on her twitter page: "Thom and I are happy to announce we are expecting a babygirl. We are delighted XXXX."
The `Piranha 3D` star has been dating the athlete for just over three months and the baby will also be his first child.
Kelly has recently been busy spending her time between London and Los Angeles working on various campaigns including one for Reebok and promoting her swimwear range for British high street store New Look.
The brunette beauty - who has dated Billy Zane and Jason Statham - recently admitted that she makes more effort with her appearance when in London because her she thinks people have a more relaxed style in Los Angeles.
She said: "When I`m in London I like dressing up. I`ll wear lots of 50s-style prom dresses, pencil skirts, and blouses because they really flatter my hourglass figure. But right now I`m living in LA so I`m living in jeans and t-shirts."