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"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.
