Once Upon a Mouse is a theatrical featurette highlighting Disney's animated legacy starting with Steamboat Willie in 1928.
| Actor | Role |
|---|---|
 Hans ConriedSlave in the Magic Mirror (voice) | Slave in the Magic Mirror (voice) |
 Walt DisneySelf - Mickey Mouse (voice) | Self - Mickey Mouse (voice) |
 Aurora MirandaSelf | Self |
 Clarence NashDonald Duck (voice) | Donald Duck (voice) |