Gillian Anderson by Mike Marsland/WireImage.com Gillian Anderson by Mike Marsland/WireImage.com
The X Files: I Want to Believe star

Gillian Anderson is pregnant with her second child with boyfriend Mark Griffiths, says People. The couple already has a baby son named Oscar, who was born in November 2006, and Anderson has a 13-year-old daughter, Piper, from her previous marriage to Clyde Klotz. A budding belly might explain the loose, towel-like dress Anderson wore to the Cannes Film Festival while promoting her film, How to Lose Friends and Alienate People. Plus, she did have that lovely, "I'm pregnant" glow. The X-Files: I Want to Believe opens July 25. - Erin Fox