3:33 PM PT -- According to the docs, obtained by TMZ, Rajskub lists the couple's date of separation as June 12. She wants joint legal and physical custody of their son and she says she's willing to pay Rolph spousal support. Rajskub claims her monthly income is around $10K per month.
Mary Lynn Rajskub -- the actress best known for playing Chloe O'Brian on the hit show "24" -- is divorcing her husband of 10 years ... TMZ has learned.
Mary filed legal docs to end her marriage with Matthew Rolph in L.A. on Tuesday. The couple began dating more than a decade ago and had a son, Valentine Anthony, in 2008.
They wed the next year in August 2009.
Along with playing Kiefer Sutherland's trusted sidekick for 8 seasons, she's also had major roles in movies like "Little Miss Sunshine" and "Safety Not Guaranteed" ... and hilariously plays the character Gail the Snail on "It's Always Sunny in Philadelphia."
Rolph is a personal trainer-turned-actor with a few minor roles to his name.