Kristin Cavallari is expecting her first baby girl.

The 28-year-old fashion designer who already has two sons, Camden, two, and Jaxon, 14 months with her Chicago Bears quarterback husband Jay Cutler, 32, confirmed the news on her her app, Kristin Cavallari Official on Thursday (09.07.15).

The former 'Hills' star posted a photo of herself with her arms over Jay's shoulders and dangling from her hands is a pair of hot pink baby Converse sneakers.

She captioned the photo: ''Our new addition! The boys are so excited to have a little sister on the way!!!''

Kristin announced in May that she was pregnant with the couple's third child.

She penned: ''Big News. We're at it again! Thrilled to announce baby number 3 is on the way! The cutler crew just keeps on growin'! (sic)''

Days before announcing the pregnancy the author confessed that she felt sad at how quickly her tots are growing.

Speaking in May, she said: ''It flies by so quickly. It kind of makes me sad. But they're both at such fun ages now. They're able to start playing together a little bit now that Jax is one. It's really nice. I feel like we're in a really good place. They're both great kids. They're just a lot of fun. So we're really lucky.''