Robin Williams' Wife Files for Divorce

wife has filed for divorce, Entertainment Tonight confirms.

Citing "irreconcilable differences," Marcia Garces Williams filed a petition in San Francisco last week to terminate the couple's nearly 19-year marriage.

The two met when Marcia worked as a nanny for the Oscar-winning actor and his first wife, Valerie Velardi, looking after their son Zachary, now 24. Shortly after his divorce from Valerie, Robin and Marcia tied the knot on April 30, 1989. They have two children, Zelda, 18, and Cody, 16.