Kristin Cavallari reveals she's expecting baby girl

Kristin Cavallari is expecting a baby girl.

The 28-year-old designer revealed the news with an adorable photo Thursday on her Kristin Cavallari Official app. The pictures sees Cavallari embrace husband Jay Cutler while holding a pair of pink Converse shoes.

"Our New Addition!" she wrote. "The boys are so excited to have a little sister on the way!!!" The designer announced she and Cutler are expecting their third child on her app in May.

Cavallari and the 32-year-old Chicago Bears quarterback have been together since 2010, and married in June 2013. The couple welcomed son Camden Jack in August 2012, and son Jaxon Wyatt followed in May 2014.