updated 05/30/2008 AT 5:00 PM ET
•originally published 06/04/2008 AT 8:05 AM ET
X-Files star Gillian Anderson is expecting her second child with boyfriend Mark Griffiths, PEOPLE has learned exclusively.
The couple have a son, Oscar, who was born in November 2006. Anderson also has a 13-year-old daughter, Piper, from a previous marriage.
Next up, Anderson will reprise her role as Dana Scully in The X-Files: I Want to Believe, a new movie due out July 25.
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