Actress-author Danica McKellar files for divorce

Danica McKellar arrives at the 20th Annual Elton John AIDS Foundation Academy Awards Viewing Party, for the 84th Annual Academy Awards, in the City of West Hollywood Park on February 26, 2012 in West Hollywood, California. AFP FILE PHOTO/PATRICK T. FALLON

LOS ANGELES – The wonder years are over for Danica McKellar and her husband of three years — the actress has filed for divorce.

McKellar cited irreconcilable differences for the breakup from composer Michael Verta in her petition, which was filed on Monday in Los Angeles.

The 37-year-old is best known for playing Winnie Cooper on ABC’s “The Wonder Years.” She went on to author three books on mathematics with titles such as “Math Doesn’t Suck” and “Kiss My Math.”

The pair married in March 2009 and have a son who will be 2-years-old in September.

McKellar, who appeared in several episodes of “The West Wing” and other series, is seeking joint custody.

Her filing states the couple has a prenuptial agreement.