<P> It was agreed that the film would be a children's musical, and that Dahl himself would write the screenplay . However, the title was changed to Willy Wonka and the Chocolate Factory . </P> <P> Screenwriter David Seltzer conceived a gimmick exclusively for the film that had Wonka quoting numerous literary sources, such as Arthur O'Shaughnessy's Ode, Oscar Wilde's The Importance of Being Earnest, Samuel Taylor Coleridge's The Rime of the Ancient Mariner and William Shakespeare's The Merchant of Venice . Seltzer also worked Slugworth (only mentioned as a rival candy maker in the book) into the plot as an actual character (only to be revealed to be Wilkinson, one of Wonka's agents, at the end of the film). </P> <P> All six members of Monty Python: Graham Chapman, John Cleese, Eric Idle, Terry Gilliam, Terry Jones and Michael Palin, expressed interest in playing Wonka, but at the time they were deemed not big enough names for an international audience . Three of the members, Cleese, Idle and Palin, were later seriously considered for the same role in Tim Burton's version . </P> <P> Before Wilder was officially cast for the role, producers considered Fred Astaire, Joel Grey, Ron Moody and Jon Pertwee . Spike Milligan was Roald Dahl's original choice to play Willy Wonka . Peter Sellers even begged Dahl for the role . </P>

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