Trivia: This was the last animated feature to be released while Walt Disney was still alive.
Trivia: Except for the prologue, the "Sword in the Stone" does not actually appear until 71 minutes, eight minutes before the film ends.
Trivia: This was the first Disney animated feature to be made by a single director.
Answer: Arthur was voiced by three actors. Rickie Sorenson and Richard and Robert Reitherman. Rickie originally voiced Arthur but, during production of the film, Rickie hit puberty causing his voice to change, so Wolfgang Reitherman chose to use his own sons to replace Rickie.