Silly Symphonies is a series of cartoons made by The Walt Disney Company. Unlike Mickey Mouse, Donald Duck, and other Disney cartoons, the Silly Symphonies did not usually feature continuing characters. The original Silly Symphonies cartoons lasted from 1929 to 1938. On Mickey Mouse Works they used Silly Symphonies as the titles to some cartoons, but unlike the original cartoons these did feature continuing characters. Donald Duck got his start in a Silly Symphonies cartoon and Pluto's first appearance without Mickey Mouse was also in a Silly Symphonies cartoon.