Robin Williams had Parkinson's Disease. His wife, Susan Schneider told People, he was in the early stages and 'was not yet ready to share publicly.'

Schneider says Williams battled his demons of depression, anxiety and 'his sobriety was intact.'

Schneider released a statement:

'Robin spent so much of his life helping others. Whether he was entertaining millions on stage, film or television, our troops on the front lines, or comforting a sick child – Robin wanted us to laugh and to feel less afraid.

"Since his passing, all of us who loved Robin have found some solace in the tremendous outpouring of affection and admiration for him from the millions of people whose lives he touched. His greatest legacy, besides his three children, is the joy and happiness he offered to others, particularly to those fighting personal battles.

"It is our hope in the wake of Robin's tragic passing, that others will find the strength to seek the care and support they need to treat whatever battles they are facing so they may feel less afraid.'

Parkinson's Disease is a degenerative disorder of the central nervous system. In the early stages, symptoms are movement-related: shaking, rigidity, slowness of movement and difficulty walking. As the disease progresses, thinking and behavioral problems may arise. Dementia commonly happens in the advanced stages. Other symptoms include depression, sleep and emotional problems.

Michael J Fox and Muhammad Ali both suffer from Parkinson's Disease.

Williams died August 11th and the world mourned. Friends, fans and family grieved the great loss. Some went to social media to voice their sorrow, some to his movies sets to place flowers and others honored him on television and radio.

Williams death is opening up the lines of communication on suicide and depression. An estimated 18 million people battle depression in the United States. If you need help or know someone who does, call the National Suicide Prevention Hotline 1-800-273-TALK (8255). Get more information at