1. After auditioning for the role of Mork, Williams was told to sit down. He did so not by sitting with his butt, but with his head.
2. For Moscow on the Hudson, Williams spent a year learning Russian customs, including a month of language classes for five hours a day.
3. He did so much ad-libbing that Aladdin had 16 hours of usable material.
And all of that improvising cost the script an Oscar nomination for Best Adapted Screenplay.
4. While voicing the film, he also spent time cheering up the cast and crew of Schindler’s List.
Steven Spielberg put Williams on speakerphone to help raise the spirits of everyone on set.