Director Paul King has explained how casting Hugh Grant as the iconic miniature creature of the Oompa Loompa in `Wonka` was the key to his adaptation of the classic Roald Dahl character.

"Going back to the book, and reading all those poems, and hearing (the Oompa Loompas`) voice as a very sort of cynical, sarcastic, cruel, funny, but wicked voice, I went, `Oh... That`s sort of a bit like Hugh!`," King told Empire magazine ahead of the trailer launch.