This is just such a sad day.
Robin Williams, who had allegedly been suffering from severe depression, has passed away from what is suspected to be a suicide due to asphyxiation.
Robin had previously checked into rehab earlier in July in order to focus on his sobriety.
However, Robin had made the trip to a substance rehab center earlier in 2006. Apparently, substance abuse had been a recurring issue in his life.
In addition, Robin had previously received a wake up call when it came to his substance abuse when his close friend John Belushi passed away: