Runaway Brain is a 1995 American animated comedy horror short film produced by Walt Disney Feature Animation. Featuring Mickey Mouse and Minnie Mouse, the short centers on Mickey attempting to earn money to pay for an anniversary gift for Minnie. He responds to an advertisement to work for Doctor Frankenollie, only to find out that he is looking for a donor to switch brains with the monster he created. Featuring animation by animator Andreas Deja, it was first released in 1995 attached to North American theatrical showings of A Kid in King Arthur's Court and in 1996 attached to international theatrical showings of A Goofy Movie. It would be the final original Mickey Mouse theatrical animated short until Get a Horse! in 2013.

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.