Baby on board! Pregnant star Morena Baccarin was photographed start of Gotham shooting scenes together with her costar and boyfriend, Ben McKenzie, using an observable baby bump on Sept. 18.

As previously reported by Us Weekly, the Homeland star, 36, is expecting a child using the O.C. alum, 37.

It’s uncertain if Baccarin’s Gotham character, Dr. Leslie Thompkins, is also pregnant in Season 2, as the actress sported a less noticeable bulge at the 2015 Emmys on Sunday, Sept. 20.

Their characters are dating and living together on the hit show.

Baccarin is already mother to a 23-month-old son named Julius, whom she shares with ex-husband Austin Chick.

According to TMZ, who first revealed the costars were anticipating, Baccarin continues to be granted joint custody of Julius, who will split time between his parents but reside in NYC with his mom.