Together since 2011, this is the couple's first child, although Baumbach shares a son with his ex-wife Jennifer Jason Leigh.
Gerwig and Baumbach have always been private about their relationship, and never spoke publicly about the pregnancy or the birth. However, motherhood is something the director explored in-depth in Lady Bird, giving equal weight to the struggles of being a teenage girl as well as those of a mother watching her daughter spread her wings.
However, a source told Extra that the baby is a boy. Whatever the sex, 25 years from now we'll likely be seeing the baby's name on the back of a directors chair. With parents like Gerwig and Baumbach, how could we not?