LOS ANGELES - Court records show Diane Lane signed her filing to divorce Josh Brolin on Valentine's Day.
Lane's petition to end the actors' marriage after eight and a half years was filed on Feb. 15.
Her filing released Friday lists irreconcilable differences for the couple's breakup and lists Feb. 13 as their separation date. It does not indicate they have a prenuptial agreement.
The actors have no children together. It was a second marriage for both when they tied the knot in August 2004.
Lane received an Oscar nomination for her performance in the 2002 film "Unfaithful" and co-stars in the upcoming Superman film "Man of Steel."
Brolin was Oscar-nominated for his performance in 2008's "Milk" and recently starred in "Gangster Squad."
A representative for the couple confirmed the divorce on Thursday.