Williams married graphic designer Susan Schneider in Oct. 2011 in St. Helena, California. It's not clear what, if anything, she will inherit from the estate.
Back in September, Williams explained why he was returning to television for the first time in about 30 years with CBS' "The Crazy Ones," alongside actress Sarah Michelle Gellar.
“The idea of having a steady job is appealing," he told Parade. "I have two [other] choices: go on the road doing stand-up, or do small, independent movies working almost for scale [minimum union pay]. The movies are good, but a lot of times they don’t even have distribution. There are bills to pay. My life has downsized, in a good way. I’m selling the ranch up in Napa. I just can’t afford it anymore.”
The show was cancelled after one season.
A call to Williams' publicist seeking comment about the estate wasn't immediately returned.