Congratulations, Keri Russell and Matthew Rhys!

The Americans co-stars have welcomed their first child into the world, according to Us Weekly. In photos obtained by the Daily Mail, Rhys can be seen carrying their newborn in his carseat.

This marks Russell's third child—as she has two children from a previous marriage, a son River Deary and daughter Willa Deary—and Rhys' first.

The former Felicity star recently opened up to Parade about how much motherhood has changed her since her early days in Hollywood, saying, "You instantly become less selfish. You can't be the biggest person in the world anymore—they are. It really grounds you."

She added, "I like working hard, but my life outside of my career is equally important to me. Maybe I'm not ambitious enough, but I'm just as interested in my friends and my relationship with my family."

Russell and Rhys met on the set of their FX hit show, which was renewed for a final two seasons. The show will end in 2018 after its sixth and last season. The proud new parents took their romance public for the very first time back in April 2014, though neither of them have spoken about their relationship in the press.

Congratulations once again on the new arrival!

That's awesome. Blew my mind when I heard this past summer they were together.