President Barack Obama called the Oscar Winner "one of a kind," stating that he "arrived in our lives as an alien - but he ended up touching every element of the human spirit."
Henry Winkler said " To watch him create on the spot was a privilege to behold" and even Sesame Street chimed in that the Crazy Ones star "always made us laugh and smile."
Mindy Kaling revealed that she was "named after a character from a Robin Williams TV show," Mork and Mindy.
But during his decades-long career starring in some of the world's most beloved films, from Good Will Hunting and Hook to Mrs. Doubtfire and Good Morning, Vietnam, Robin was the one doing the talking - and eliciting hearty laughter at every turn.
And despite the tortured life he was leading, battling severe depression and taking his own life in the end, the stand-up comedian touched the world again and again - and even won a Grammy award for best spoken word album in 2003.
As his life comes to an end, the father of three will live on in his films, his charity work, his friends and family - and the many profound quotes the actor leaves in his wake.
Here, we gather 10 of our favourite soundbites.