She then announced the news on her app.
"We're at it again! Thrilled to announce baby number 3 is on the way! The cutler crew just keeps growin'!" she said on the site, next to a picture of her in front of her two sons Camden, 2, and Jax, 1. In the picture on the app, she makes a heart around her pregnant belly.
Cavallari and Cutler were married in June 2013.