Keri Russell and her Americans co-star, Matthew Rhys, are reportedly expecting their first child together. Russell is already mom to River, 8, and daughter Willa, 4, with ex-husband Shane Deary.

Russell, 39, and Rhys, 41, began dating the same year she split from Deary after seven years of marriage in 2013.

“Keri is more than four months along,” a source told Us Weekly. “It’s so exciting for them!"

They spent a lot of time together since they work together in New York and have posed together a few times at red carpet events.

“Matthew is really in love,” a source said. “They feel they should have always been together.”

Russell’s rep has not responded to request for a comment about the rumored pregnancy.