Gillian Anderson: Baby #2!

(WireImage)

Sci-fi lovers can file this one under "B" for "baby": X-Files star Gillian Anderson gave birth to a boy, Felix, in London on Oct. 15.

The bundle of joy is the second child for Gillian and boyfriend Mark Griffiths – their first is 2-year-old Oscar, however a rep for the actress says that The Odd Couple monikers weren't on purpose.

"She's never even seen the show, says Connie Freiberg, according to the Associate Press. "She had no idea. ... I brought it up to her, and it really doesn't sink in.''

The two boys also have a big sister, a 14-year-old  from Gillian's marriage to Clyde Klotz.

Congratulations to the happy family!