Keri Russell has given birth to her and Matthew Rhys' first child, Us Weekly reports. The Americans costars—who are an on-screen couple and are rumored to have started dating off-screen in 2013—welcomed the baby sometime last week, a source tells the outlet: "Keri and Matt both look overjoyed and are over the moon to be new parents."
Russell already has a 4-year-old daughter, Willa, and eight-year-old son, River, with her ex-husband Shane Deary. The two divorced in 2013.
Russell and Rhys have never spoken publicly about their romantic relationship, though Russell confirmed on Jimmy Fallon she was pregnant in February.