The 64-year-old "Independence Day: Resurgence" star's Olympic gymnast wife made the exciting announcement on her Instagram account.
"Round and round we go!" she wrote in the caption to a photo featuring herself balancing on a wooden barrel.
"I'm 15 weeks pregnant in this shot and I'm SO excited for our newest addition to the Goldblum family, arriving early April!!! #growingfamily #love".
The new baby will be joining 15-month-old big brother Charlie Ocean in the household.
Before welcoming little Charlie in 2015, Jeff was childless. He was married twice before, to actress Patricia Gaul and his "The Fly" co-star Geena Davis.