American actor Robin Williams was a source of joy and laughter for many for several years. But his final days were a "roller coaster of hope and despair," according to a trailer for the new documentary film Robin's Wish, in which his widow and his colleagues examine the little-known brain disease revealed to be the source of his torment only after he died.

Williams died by suicide in 2014 at the age of 63. In the film, those who knew him well call him a "genius" and a "warrior," but sensed "something eroding within him." After his death, his family learned his anxiety and mental health strains were caused by neurodegenerative disorder Lewy Body Dementia. An intimate portrait of Robin and his invulnerable spirit, Robin's Wish is the story of what really happened to one of the greatest entertainers of all time - and what his mind was fighting.

Recommended Read: Antonio Banderas reveals testing positive for Coronavirus on 60th birthday

The film explores this condition and the pain it caused Williams. It will be released on September 1, 2020.

(Source: YouTube)