Gillian Anderson & Longtime Partner Split (Report)

Gillian Anderson and Mark Griffiths attend the UK Premiere of 'Mission: Impossible Ghost Protocol' at BFI IMAX in London on December 13, 2011 Gillian Anderson and Mark Griffiths attend the UK Premiere of 'Mission: Impossible Ghost Protocol' at BFI IMAX in London on December 13, 2011

Gillian Anderson is back on the market.

The former “X Files” star has split from her longtime partner, Mark Griffiths, her rep confirmed to People.

The 43-year old actress and Griffiths, who began dating in 2006, have two sons together – Oscar, 5 and Felix, 3.

Anderson has a daughter, Piper Maru, from her previous relationship with Clyde Klotz (they married in 1994, but split in 1997).

The actress then married documentary filmmaker Julian Ozanne in 2004, before separating in 2006.

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