Gillian Anderson and Mark Griffiths

Gillian Anderson and her longtime beau, Mark Griffiths, called it quits in 2012. A rep told Us Weekly on Aug. 7, 2012, that the couple, who dated for six years, "amicably separated." Anderson and Griffiths have two sons together. The "X-Files" star was previously married to film art director Clyde Kotz, as well as documentary filmmaker Julian Ozanne.

Credit: Samir Hussein