There have been countless tributes to Robin Williams on Twitter tonight, but a simple tweet by the Academy of Motion Picture Arts & Sciences was retweeted more than 12,000 times in the first 30 minutes it was posted and more than 25,000 in less than an hour.

https://twitter.com/kaliq777/status/499005698072911872

https://twitter.com/anbeam/status/499005150321999872