Silly Symphony in the context of Academy Award for Best Animated Short Film

Fantasia is a 1940 American animated musical anthology film produced by Walt Disney Productions, with story direction by Joe Grant and Dick Huemer and production supervision by Walt Disney and Ben Sharpsteen. It consists of eight animated segments set to pieces of classical music conducted by Leopold Stokowski, seven of which are performed by the Philadelphia Orchestra. Music critic and composer Deems Taylor acts as the film's Master of Ceremonies who introduces each segment in live-action.

Disney settled on the film's concept in 1938 as work neared completion on The Sorcerer's Apprentice, originally an elaborate Silly Symphony cartoon designed as a comeback role for Mickey Mouse, who had declined in popularity. As production costs surpassed what the short could earn, Disney decided to include it in a feature-length film of multiple segments set to classical pieces with Stokowski and Taylor as collaborators. The soundtrack was recorded using multiple audio channels and reproduced with Fantasound, a pioneering sound system developed by Disney and RCA that made Fantasia the first commercial film shown in stereo and a precursor to surround sound.

Mickey Mouse (originally known as Mickey Mouse Cartoons) is a series of American animated comedy short films produced by Walt Disney Productions. The series started in 1928 with Steamboat Willie and ended with 2013’s Get a Horse! being the last in the series to date, otherwise taking a hiatus from 1953 to 1983. The series is notable for its innovation with sound synchronization and character animation, and also introduced well-known characters such as the titular protagonist Mickey Mouse, Minnie Mouse, Pluto and Goofy.

The name "Mickey Mouse" was first used in the films' title sequences to refer specifically to the character, but was used from 1935 to 1953 to refer to the series itself, as in "Walt Disney presents a Mickey Mouse". In this sense "Mickey Mouse" was a shortened form of "a Mickey Mouse cartoon" which was used in the earliest films. Films from 1929 to 1935 which were re-released during this time also used this naming convention, but it was not used for the three shorts released between 1983 and 1995 (Mickey's Christmas Carol, The Prince and the Pauper, and Runaway Brain). Mickey's name was also used occasionally to market other films which were formally part of other series. Examples of this include several Silly Symphonies and Goofy and Wilbur (1939).