Ubbe Ert Iwerks, known as Ub Iwerks, was an American animator, cartoonist, character designer, inventor, and special effects technician, known for his work with Walt Disney Animation Studios in general, and for having worked on the development of the design of the character of Mickey Mouse, among others. Born in Kansas City, Missouri, Iwerks grew up with a contentious relationship with his father, who abandoned him as a child. Iwerks met fellow artist Walt Disney while working at a Kansas City art studio in 1919.

Walt Disney Animation Studios (WDAS), sometimes shortened to Disney Animation, is an American animation studio that creates animated features and short films for The Walt Disney Company. The studio's current production logo features a scene from its first synchronized sound cartoon, Steamboat Willie (1928). Founded on October 16, 1923, by brothers Walt Disney and Roy O. Disney, it is the oldest-running animation studio in the world. It is currently organized as a division of Walt Disney Studios and is headquartered at the Roy E. Disney Animation Building at the Walt Disney Studios lot in Burbank, California. Since its foundation, the studio has produced 62 feature films, from Snow White and the Seven Dwarfs (1937) to Wish (2023), and hundreds of short films.