The night before, the mother-to-be teased the baby’s sex after making the cake during the late hours.
“It’s 9:30 and we have finally finished the cake! Carmen is still up and has eaten SO much funfetti. I’m so excited to tell you all tomorrow if it’s a girl or a boy!!! I’m gonna have the kids cut the cake with us!!” she captioned a photo of the dessert that had “Baby?” written in blue and pink frosting.
The baby on the way will be Hilaria’s fourth and Alec’s fifth child. He is also a parent to 22-year-old daughter Ireland from his previous marriage to actress Kim Basinger.
“Our Baldwinitos are getting a new teammate this spring,” the mother of three announced on Instagram Friday, with the actor re-posting on his account: “Here we go again … ”
In October, Hilaria publicly made it known that she would “totally do one more” pregnancy.
“For some reason, right after I deliver a baby I want another one,” she told Access Hollywood. “I feel like it’s like going down this, like, crazy slide, and then you’re like, ‘I wanna go again.’ ‘Cause it’s just so invigorating and I had great experiences.”
This article originally appeared on PEOPLE.