Oscar winner Robin Williams' second wife filed for divorce on Friday at a court in San Francisco after 19 years of marriage, citing irreconcilable differences, media reported today.

Williams' representative, Mara Buxbaum, confirmed the divorce case but had no further comment.

An attorney for his estranged wife, Marsha Garces Williams, would not comment on the case.

Williams, 56, and Garces, 51, met when Garces worked as a nanny for Williams' son Zachary from his previous marriage to Valerie Valardi.

The couple have two children, an 18-year-old daughter and a 16-year-old son.

Williams won a best supporting actor Oscar for his role in the film "Good Will Hunting." He has been nominated for an Oscar for three other movies: "Good Morning Vietnam," "The Fisher King," and "Dead Poets Society."

Garces has worked as a producer on several of Williams films including "Jakob the Liar," "Patch Adams," and "Mrs. Doubtfire."