Robin Williams had several connections to Disney, some of which were in the theme parks.
Obviously, he was the voice of Genie in Aladdin, and he starred in the movie Flubber.
He also starred with Walter Cronkite in Back to Neverland, an attraction originally at the Disney Studios in Florida, and later cloned at DCA's animation building. Also, he voiced the main character in the Timekeeper 360 degree show at Walt Disney World. These were all brilliant and showcased his amazing talent.