Garcelle Beauvais-Nilon is expecting twins with her husband, talent agent Michael Nilon, her rep tells PEOPLE.

"We are over the moon and feel very blessed," Beauvais-Nilon says. The twins, due this fall, will join Oliver, the actress's 15-old son from a previous marriage.

Beauvais-Nilon, who has appeared in TV's NYPD Blue and The Jamie Foxx Show, will next be seen in the thriller I Know Who Killed Me, starring Lindsay Lohan and Julia Ormond.

Her husband is an agent for Creative Artists Agency.

The couple wed in a private ceremony in Los Angeles in May 2001.