Keri Russell Welcomes First Child With Matthew Rhys (Report)

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Keri Russell and Matthew Rhys

The couple met on the set of FX's hit series 'The Americans.'

Keri Russell has much to celebrate this Memorial Day weekend — she's a mom again!

Russell, 40, has reportedly welcomed her first child with The Americans co-star Matthew Rhys, 41, reports Us Weekly. A source tells the glossy that the actress "gave birth sometime last week," adding that the couple "are over the moon to be new parents."

Though the pair, who met on the set of their FX hit show, have remained quiet about their relationship, news broke in January that the Felicity alum was expecting a baby with the British actor.

Russell is already mom to two kids — River Deary, 8, and Willa Deary, 4 — from her previous marriage with ex-husband Shane Deary, whom she divorced in 2013. This will be Rhys' first child.

Reps for the actors did not immediately respond to The Hollywood Reporter's request for comment.