Willy Wonka May 2003, Burton immediately thought of Johnny Depp for the role of Willy Wonka, who joined the following August for his fourth collaboration with the director. Burton and screenwriter John August worked together in creating Wilbur Wonka, Willy's domineering dentist father. "You want a little bit of the flavor of why Wonka is the way he is," Burton reasoned. "Otherwise, what is he? He's just a weird guy." Warner Bros. and Burton held differences over the characterization of Willy Wonka. The studio wanted to make Willy Wonka the idyllic father figure Charlie Bucket had longed for his entire life. Burton
Willy Wonka & the Chocolate Factory to buy the rights to the book and finance the picture for the purpose of promoting a new Quaker Oats "Wonka Bar". David L. Wolper and Roald Dahl agreed that the film would be a children's musical, and that Dahl himself would write the screenplay. However, Wolper changed the title to "Willy Wonka and the Chocolate Factory". 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