Deliberate mistake: When Arthur is drawing letters of the alphabet, he only draws the outside of the letter A, not the horizontal stroke in the middle, yet it appears on the blackboard.
The Sword in the Stone (1963)
1 deliberate mistake - chronological order
Directed by: Wolfgang Reitherman
Starring: Sebastian Cabot, Junius Matthews, Karl Swenson, Rickie Sorensen
Continuity mistake: When Pelinore enters the castle, he takes the glove off his left hand. When he's passing Wart, however, his right hand is the one that is bare. Immediately afterwards the bare hand switches back to his left.
More trivia for The Sword in the StoneMore questions & answers from The Sword in the Stone
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.