The former Hills star and her football-playing husband Jay Cutler are expecting their second child together. Cavallari confirmed the news on social media Wednesday.
"Thank you for all the love!! We are so excited for Camden to be a big brother!” the 26-year-old fashion designer wrote on Instagram.
Cavallari and the Chicago Bears quarterback welcomed their first son, Camden last year. The couple, who married in June, have been open about their desire to expand their family for some time.
"We want to have a second sooner rather than later," the 26-year-old told E! News in September. "We're working on it."
Asked if she'd want to have another boy or a girl, Cavallari said either would be fine.
"Obviously, I want a little girl, but if I had another boy I would be so excited as well," she said. "I love having a boy. Either way, I'd be really, really happy."