Kristin Cavallari is reportedly pregnant with her second child.

According to E! News, the former star of The Hills is set to welcome baby number two with her NFLplayer hubby Jay Cutler.

The reality starlet is already mum to baby son Camden, who recently celebrated his first birthday.

Kristin and Jay have made no secret of their desire to expand their family, with the 26-year-old blonde beauty telling E! News in September that they were keen to “have a second sooner rather than later."

Cavallari added: "We're working on it!"

The couple tied the in a rustic ceremony in Nashville in June of this year, and admitted they were keen to give son Camden a sibling as soon as possible.

Kristin dished: "We know we want another one close in age to Camden and we're at the point where we're both ready.

"Before Camden was born, I thought I'd be pregnant again by the time he was six months, but I definitely wasn't ready. Now, I'm finally ready."