Kristin Cavallari [1] is having a girl! The star revealed the news on her official app, created by DWNLD [2]. She shared a sweet black-and-white photo with husband Jay Cutler, and just a pop of pink on the little sneakers in her hand. "The boys are so excited to have a little sister on the way!!!" the announcement read, referring to Kristin and Jay's two young sons, Camden and Jaxon. Kristin first announced the pregnancy back in May [3], and since then, we've caught a glimpse of her growing baby bump [4] in a bikini. Keep reading to see the official announcement for yourself, and get ready for Kristin's little girl!