'Gotham' Co-Stars Benjamin McKenzie and Morena Baccarin Expecting First Baby Together

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Just when we were just getting used to Gotham co-stars Benjamin McKenzie and Morena Baccarin being a couple in real life, the two are now expecting a baby together, McKenzie's rep confirms to ET.

There was no noticeable baby bump when Baccarin and 37-year-old McKenzie were spotted together at multiple events over Emmy Awards weekend, and posed together on the red carpet at Fox's after party.

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Though they've remained tight-lipped about their romance, the pair was spotted talking intimately backstage at the awards show on the Emmys.com backstage cam.

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News of the 36-year-old actress' pregnancy was first revealed when she filed court documents on Thursday asking a judge to award her full custody of her 1-year-old-son, Julius, with her ex-husband, producer and director Austin Chick. The Homeland star asked for a proactive order since Chick is based in Los Angeles, and she lives in New York, and she will no longer fly back and forth due to her pregnancy.

Baccarin joined Gotham in late 2014 and her character, Dr. Leslie Thompkins, became romantically involved with McKenzie’s Jim Gordon at the end of the show's first season. Interestingly enough, this isn't the first time the two have worked together. She also made a one-episode appearance on The O.C. in 2006, the Fox hit that made McKenzie a star.

Baccarin and her ex-husband were married in 2011, and Chick filed for divorce on June 12, 2015, citing irreconcilable differences. As for McKenzie, he's been notoriously private about his dating life, though he did tell Elle last December that he "never had a problem being monogamous" in a relationship.

Though he was stumped when asked what his exes would say about him.

"He’s great in bed," he joked. "Early on, stubborn. Maybe a little detached at times...I don't know what they would say. But I would be fascinated to get the polling on that."

WATCH: Bummer! Mischa Barton Shoots Down Any Chance of an 'O.C.' Reunion

Last September, McKenzie exclusively dished to ET about his painful injury on the Gotham set, when he rammed his head into concrete on his 36th birthday. Watch below: