Keri Russell married her longtime boyfriend, contractor Shane Deary, in an intimate Valentine’s Day ceremony on Wednesday, her rep tells PEOPLE.

The thirty year olds are expecting their first child in September.

Keri played the title role of Felicity Porter in the hit WB drama from 1998 to 2002. In 2006 she appeared opposite Tom Cruise in Mission: Impossible 3.

Her new movie, the independent romantic comedy Waitress, was directed by the late Adrienne Shelly and screened at Sundance. Later this year, she will also star in August Rush with Robin Williams and Girl in the Park with Kate Bosworth.