And a baby makes four!
The couple is already proud parents to baby Camden, who turned one over the summer.
K.Cav's pregnancy shouldn't come as a total shock, however, as she's been open for the last several months about wanting to expand her family.
In fact, in September she told E! News that she and Cutler were already trying to grow their brood.
"We want to have a second sooner rather than later," the 26-year-old told E! News at a Junk Food Vintage NFL event in New York. "We're working on it!"