The Showtime star and her husband Wade Allen welcomed their second son into the family Saturday, Oct. 25, in Rhode Island, reports People.
Enzo Edward Allen weighed 7 lbs. at birth. He also has an older brother, Cash, 21 months.
Gish, 37, met Allen, a martial arts expert/stuntman, while she played Special Agent Monica Reyes opposite Robert Patrick on "The X-Files." They married in 2003.
She's also known for portraying President Bartlet's eldest daughter on "The West Wing." On Showtime's "Brotherhood," she plays fictional Rhode Island State Representative Tommy Caffee's wife Eileen, who struggles with her weakness for drugs and infidelity. The third season returns on Sunday, Nov. 2 and incorporates her pregnancy into the story.