For decades, Robin Williams was the effervescent personification of comedy in Hollywood, an ebullient comedian who was willing and able to use every tool available to get a laugh, whether it was wacky physical humor or whip-smart wordplay. He later turned to drama and won praise as a serious thespian, proving he was more than a one-trick pony. But throughout his career, Williams also seemed to hold an obsession with the world of Batman, and he was determined to play a villain from the Dark Knight's rogues gallery on screen. Sadly, he never got that chance — but it wasn't for lack of trying.

Even as far back as the 1980s, Williams wanted in on a role in what eventually became Tim Burton's iconic "Batman" film, hoping to play the Joker. Years later, he was in line for the Riddler in "Batman

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