The couple have welcomed a baby girl, their second daughter together, Bell revealed Friday night via Twitter.
"The estrogen has now hit critical mass! Good luck, @daxshepard1. And welcome to the world DELTA BELL SHEPARD :)," she wrote alongside a photo of a mama monkey's hand holding the wee fingers of a baby monkey.
We're kinda diggin' that name! Delta joins big sister Lincoln in the family fold.