The Oompa Loompas are a fictional race of small people who work in Willy Wonka's chocolate factory in the 1964 novel Charlie and the Chocolate Factory by Roald Dahl. They are described as being orange-skinned with green hair and wearing white overalls. The Oompa Loompas are known for their singing and dancing, and they help Wonka run his factory. They are also responsible for creating the various inventions and treats that Wonka produces.