March 21 (UPI) -- Lady Bird director Greta Gerwig is a new mom.
E! News said Gerwig and Baumbach were spotted pushing a baby stroller during an outing Tuesday in New York.
"Noah was pushing and Greta was right next to him. They were chatting and enjoying some fresh air," a source said. "It seemed like the baby was sleeping because they were busy talking and didn't have to tend to the baby."
"They looked happy but a little bit tired," the insider added. "They walked around their neighborhood for several blocks before heading home."
Gerwig and Baumbach met on the set of Baumbach's 2010 film Greenberg. The couple later collaborated on Baumbach's movies Frances Ha and Mistress America, which they co-wrote together.