This article is about the fictional character. For the candy company, see, The Willy Wonka Candy Company.

Willy Wonka is a major character of Roald Dahl's 1964 children's novel Charlie and the Chocolate Factory and the film adaptations that followed. The book and the 1971 film adaption both vividly depict an eccentric Wonka — a feature arising from his creative genius. He bewilders the other characters with his antics, but Charlie enjoys Wonka's behavior. In the 2005 film adaption, Willy Wonka's behavior is viewed more as a (sympathetic) character flaw.

Candy maker Willy Wonka has hidden five Golden Tickets amongst his Wonka Bars. The finders of these special tickets will be given a full tour of his tightly guarded candy factory as well as a lifetime supply of chocolate. The contest sets off a global craze with everyone desperately seeking out the tickets. They are eventually found by five different children from around the world.

Wonka greets the winning children and their guardians at the factory gates. He immediately shows his unpredictability by slowly hobbling towards the gate with a cane, then pretending to fall, only to do a somersault and spring back to his feet with a flourish. Once he and his visitors are inside, Wonka requires each to sign a contract before the tour can begin. The tour progresses though many fantastic rooms and labs in the factory, all run by Wonka's crew of Oompa Loompas. Along the way, four of the children misbehave against Wonka's warnings, resulting in serious but comical consequences and removing them from the tour.