The Americans family is about to get a bit bigger. Us Weekly exclusively revealed this morning that American costars, Keri Russell and boyfriend Matthew Rhys are expecting a baby together. 39 year old Russell is also mom to 8 year old son River and 4 year old daughter Willa with ex-husband Shane Deary, who she divorced in 2013 after six years of marriage. A source says Russell is more than 4 months along.