People.com confirmed Tuesday the pair have ended their six-year-long relationship, which produced their sons Oscar, 5, and Felix, 3.
No reason was given for the split.
Best known for her work on TV's "The X Files," Anderson was previously divorced twice and has a daughter from her first marriage.
Beautician charged with giving client fatal silicone butt injection
McPhee, Cokas 'working on their marriage' after affair