Ryan Gosling was seen for the first time since his baby's birth Credit: SBMF/Patriot Pics/FAMEFLYNET

Hey, dad. Ryan Gosling stepped out in Atlanta, GA on Friday, Oct 24 -- the first time he's been seen since becoming a father. 

The Oscar-nominated star, 33, returned to work in Atlanta to begin filming his upcoming movie The Nice Guys. He sports a mustache for the role of a private eye in the film, which also stars Russell Crowe, Matt Bomer, and Kim Basinger

This is Gosling's first project since his longtime girlfriend Eva Mendes gave birth to the couple's first child on Sept. 12. 

Though the hunky Only God Forgives actor and Mendes, 40, have been extremely quiet about the pregnancy and birth, a birth certificate obtained by TMZ shows that the little girl was born in Santa Monica, Calif. and is named Esmeralda Amada Gosling.

"Ryan is thrilled it's a little girl," a source told Us Weekly at the time of the baby's birth, while another source added that the new father "hasn't left Eva's side."

"Ryan goes out and gets the groceries," a third source dished to Us. "[Eva's] been wanting pasta, and he's cooking her meals… Ryan has already stepped into the role of caring father."

Mendes has yet to comment nor make a public appearance since the birth.