Keri Russell and Matthew Rhys, who play a married couple on the FX series “The Americans,” reportedly are expecting a child.

Us Weekly said Wednesday that Russell, 39, is four months pregnant.

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The actors’ representatives did not return Newsday requests for comment.

Russell and Rhys, 41, were first speculated to be a couple in December 2013.

While never confirming a relationship, they were seen together numerous times in New York, where their Cold War drama is filmed, and behaved affectionately while attending the play “The Library” at The Public Theater in March 2014.

Russell has two children, son River, 8, and daughter Willa, 4, with contractor Shane Deary, from whom she became separated in summer 2013 after six years of marriage.