Keri Russell is a mum again! The stunning 40-year-old recently gave birth to her first child with her boyfriend and The Americans costar, Matthew Rhys. No more information on the baby's sex or name has been revealed. Keri, who started dating Matthew in early 2014, is already mom to daughter Willa, 4, and son River, 8, with her ex-husband, Shane Deary. Congratulations!