Willy Wonka and the Chocolate Factory is a 1971 film adaptation of the Roald Dahl children's book 'Charlie and the Chocolate Factory', published in 1964. The film centers around the young poor boy Charlie Bucket, and the resurface of famous chocolatier Willy Wonka, who's stashed five golden tickets in Wonka Bars across the world. The tickets' finders, including Charlie and four spoiled children, are allowed into his chocolate factory and given the chance to win a special prize.

One of the spoiled children, the gum-chewing competitor Violet Beauregarde, tries Wonka's experimental three-course meal gum that ends up inflating her into a big blueberry once it gets to dessert, blueberry pie and ice cream. In production, her actress, Denise Nickerson, wore two different suits to simulate her sudden expansion; one that was pleated to allow the initial stages where her outfit starts to grow with her, and a big spherical ball that rendered her immobile, representing Violet's full blueberry form. Due to the nature of the second suit, Nickerson was rolled around every five minutes to stimulate blood flow. In addition to this, her face was coloured blue as the first sign of her character's transformation.