"Gillian Anderson and her partner Mark Griffiths have amicably separated after six years together," aceshowbiz.com quoted a representative for the 43-year-old actress as saying.

Anderson and Griffiths have two sons Oscar, 5, and Felix, 3. Before she started dating Griffiths, Anderson was married twice, once to director Clyde Kotz, whom she divorced in 1997 and later she married documentarian Julian Ozanne but the couple also parted ways in 2006.