The stylist, 39, and husband Rodger Berman are expecting their first child next year, she announced via Twitter Wednesday.
"Hey everyone! I want to officially confirm to my loyal friends and followers that I am pregnant!" Zoe wrote.
"I feel great, Rodger and I are beyond excited and so thankful for all of your love and support."
The couple chronicled their struggle to decide if they should become parents this past season on their Bravo reality show, The Rachel Zoe Project.