A new documentary will delve into the final days of Robin Williams' life. Watch the trailer below:
Robin's Wish includes interviews with the late comedian's family, friends and colleagues to explore what was really going on with him in the lead-up to his untimely death.
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It will also, for the first time, explain exactly how Williams' life had been affected by the condition he had been suffering from but not known about, Lewy Body Dementia.
Speaking about the doc, its creators said: "Robin's Wish tells the powerful true story of actor/comedian Robin Williams' final days.
"For the first time, Robin's fight against a deadly neurodegenerative disorder, known as Lewy Body Dementia, is shown in stunning detail. Through a gripping journalistic lens, this incredible story sheds an entirely new light on the tragedy, beauty and power behind the mind of one of the greatest entertainers of all time."
In a statement, Williams' widow Susan Schneider Williams said her husband was in a lot of pain before his death.
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She said: "During the last year of his life, Robin was confronted with anxiety, paranoia, insomnia, scary altered realities and a roller coaster of hope and despair.
"With our medical team's care, we chased a relentless parade of symptoms but with very little gain.
"It wasn't until after Robin's passing, in autopsy, that the source of his terror was revealed: he had diffuse Lewy body disease. It was one of the worst cases medical professionals had seen."
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Mrs Schneider Williams added: "Armed with the name of a brain disease I'd never heard of, I set out on a mission to understand it, and that led me down my unchosen path of advocacy.
"With invaluable help from leading medical experts, I saw that what Robin and I had gone through finally made sense - our experience matched up with the science. And what I discovered along the way was bigger than me, and bigger than Robin.
"The full story was revealed during the making of this film and it holds the truth that Robin and I had been searching for."
Discussing the title of the film, Mrs Schneider Williams said that it was based on her late husband's philosophy.
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"Robin wanted to help all of us be less afraid," she said.
"That was Robin's wish. We had been discussing what we wanted our legacies to be in life; when it was our time to go, how we wanted to have made people feel.
"Without missing a beat, Robin said, 'I want to help people be less afraid.'"
Robin Williams was found dead at his home in Tiburon, California on 11 August 2014. He was 63 years old.
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Robin's Wish will be available to watch on demand on 1 September.
Topics: Celebrity, Robin Williams, US Entertainment, Health