Gillian Anderson at premiere in London Photo by: Jon Furniss / WireImage
EXCLUSIVE: Gillian Anderson Welcomes a Son
X-Files star Gillian Anderson and boyfriend Mark Griffiths are parents of a baby boy, the actress's rep tells PEOPLE exclusively.

Felix Griffiths, weighing 6 lbs., 15 oz., was born Oct. 15 in London, says rep Kelly Bush.

Felix is the second child for Anderson, 40, with Griffiths, joining their 1-year-old son Oscar. Anderson also has a 14-year-old daughter, Piper, from a previous marriage.

To keep track of upcoming celebrity baby arrivals, visit Celebrity Baby Blog's Who's Due Next Gallery
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JOSH & FERGIE: ROCKED BY SCANDAL

Did he cheat with a stripper?

Married less than a year, the couple denies an Atlanta woman’s claims that she and Josh had a fling
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