From Sfgate.com
Robin Williams and Marsha Garces Williams, married in April 1989, are splitting up. Garces Williams filed a divorce petition in San Francisco on March 21, seeking to end her marriage to Williams on the grounds of irreconcilable differences.
She is in her early 50s; he is 56. They married soon after Williams' divorce from Valerie Velardi, to whom he had been married for 10 years. Williams' and Garces' daughter, Zelda, was born in July of that year; their son, Cody, in 1991.