Ben and his pregnant girlfriend Morena Baccarin beamed in photos at the TV viewing party held at the Refinery Rooftop on Monday night (29 February).
Heavily pregnant Morena, who stars in the latest Deadpool movie, looked stunning in a pleated white dress with a black belt to accentuate her blossoming bump.
Ben and Morena met on the set of Gotham but kept their relationship away from the spotlight.
It was only in September last year that Ben confirmed he was expecting a child with his co-star, just a few days after it emerged that they were dating after going public at the Emmy Awards in Los Angeles.
This will be Ben's first child. He is famed for his role as Ryan Atwood in TV series The O.C. from 2003 to 2007, but more recently, he is now known for his portrayal as young detective James Gordon in Gotham.
Brazilian-American actress Morena is already mother to son Julius from her previous marriage with Austin Chick.
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