The character of Scat Cat was designed to be voiced by Louis Armstrong. The character's look was modeled after Armstrong - the way he played his trumpet, his roly-poly physique, right down to the prominent gap between his teeth. However, Armstrong was unable to record a single line due to illness. His replacement, Scatman Crothers, was directed to "Pretend you're Satchmo."
This was the last animated feature to be approved by Walt Disney and the studio's first animated feature to be entirely completed after his death. It should be noted, however, that Disney had spent time working on the story for The Rescuers (1977) (released seven years later) around the time The Jungle Book (1967) entered production.
The dogs Napoleon and Lafayette are both named after famous French generals Napoléon Bonaparte and Marquis De Lafayette. Napoleon was the emperor of France who conquered much of Europe. Lafayette was a nobleman who helped the Americans during the American Revolution.
Originally there was meant to be a direct-to-video sequel titled AristoCats II. It was intended for a 2007 release, but production was canceled back in 2006 after John Lasseter became CEO of both Disney and Pixar.
The goose sisters, Abigail and Amelia, are voiced by Carole Shelley and Monica Evans, who played the equally-chatty Pigeon sisters, Cecily and Gwendolyn, in the movie, TV series, and original Broadway production of Neil Simon's The Odd Couple (1968).
The lines in "Ev'rybody Wants To Be A Cat" sung by Chinese Cat (Paul Winchell), were later deemed politically incorrect and removed from the soundtracks. However, they remain in the song as featured in the home releases.