Williams' wife and press representative both released statements Monday confirming the death.
They say the actor had been suffering "severe depression of late."
Williams' wife, Susan Schneider, says she is "utterly heartbroken" and hopes that people will focus on Williams' life and the "countless moments of joy and laughter he gave to millions."
The Marin County Sheriff's Department says Williams' death appears to be suicide due to asphyxia.
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