Gillian Anderson is sadly adding longtime love Mark Griffiths to her ex files.
"Gillian Anderson and her partner Mark Griffiths have amicably separated after six years together," a rep for the actress, 43, tells Us Weekly exclusively.
The duo, who never wed, share sons Oscar, 5, and Felix, 3.
The X-Files and House of Mirth actress has been married twice before. She and film art director Clyde Kotz, with whom she shares daughter Piper, 17, divorced in 1997; the star and documentarian Julian Ozanne were married for two years before parting ways in 2006.
Following her role as Miss Havisham in a 2011 PBS miniseries adaptation of Great Expectations, Anderson has a full slate of projects in 2012: the films Mr. Morgan's Last Love, I'll Follow You Down and The Curse of the Buxom Strumpet, plus BBC miniseries The Fall.
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