Hey, It's That Voice!: Snow White was voiced by Adriana Caselotti, whose contract did not allow her to have other prominent roles. "She was not allowed to perform in other roles after that, nor to make public appearances and perform, saying that they did not want to spoil the illusion of Snow White." But she still got a small singing part in the The Wizard of Oz (1939). During the "If I Only Had a Heart" musical number, Adriana is actually heard saying "Wherefore art thou Romeo?." Also, Adriana appeared in a brief role as the singer at the Martini bar in It's a Wonderful Life (1946).
Grumpy is voiced by Pinto Colvig, whom you may also remember as the original voice of Goofy and the third pig on both the Disney version of the Three Little Pigs and the MGM World War II cartoon, Blitz Wolf.
Mean Character, Nice Actor: Lucille LaVerne as The Queen. If you look at one of her pictures, she looks nicer and friendlier and definitely less intimidating than the evil witch.
Money, Dear Boy: A big reason why Disney made this feature was that the Short Film product they made only brought in a set amount of revenue from their distributor regardless of how much audience interest in it. With features however, Disney's company could haul in much more if it proved a hit.
Old Shame: In recordings of Walt Disney commenting on the film, he said that after so many people seemed to dislike his films afterwards because none seemed to be as good as Snow White in their opinion, he grew to hate Snow White for a while. Though he eventually came back to loving his masterpiece.
What Could Have Been: There were originally intended to be scenes with the Prince imprisoned by the Queen in a dungeon and making a daring escape, which was dropped because the animators were not yet experienced enough to handle the extra work of making a believable human character, what with Snow White and the Queen already taxing their skills. Some of these ideas were eventually used in Sleeping Beauty.
Additionally, some of the scenes with the Dwarfs were also cut, mostly to tighten up the story. Best known of these was the "Music in Your Soup" song, which was eventually shown on the Disneyland program in pencil test form. There's also a missing scene where the Dwarves build a bed for Snow White, which turned up in a childrens' book.
All three of the Queen's assassination attempts (poison comb, bodice suffocation and the poison apple) were originally going to be included, but eventually they streamlined it to just the apple instead. The bodice was cut first, and the comb appears in the title card at the beginning.
There was also concept art showing that the queen would have shattered the magic mirror upon realizing that Snow White was still alive.
Another proposed fate for the queen was shown in an Italian comic where she returned to the castle in hag form to ask the mirror who was the fairest in the land now. However, the Huntsman had already rallied a party to burn down the castle in order to put an end to her infernal majesty's reign. After receiving her answer from the mirror, she was burned alivewith the mirror just watching her suffer.
Dopey almost made an appearance in "Fantasia" as the Sorcerer's Apprentice.
Deanna Durbin auditioned for the voice of Snow White, but was not chosen because Walt Disney felt her voice was too mature.
At one time, Disney Toon Studios was exploring the idea of turning the Seven Dwarfs into a boy friendly franchise much like Disney Fairies was one for girls. An epic Lord of the Rings inspired adventure that would explore how they came together as well as the origins of the Magic Mirror and Evil Queen was proposed, along with a Darker and Edgier video game prequel by Obsidian Entertainment about the Dwarfs' ancestors. This project ended up getting trimmed down in scope to a more comedic affair that would have revealed Dopey's muteness being the result of childhood trauma watching hismotherdie, but nobody had the nerve to present this idea to John Lasseter and he cancelled a further meddled version immediately.
A Snow White II was planned in 2002. It was about the evil Queen's sister Noriss learning from her magical crystal ball that the only way to make Snow White and her family leave the castle would be to kidnap her friends the dwarfs. She goes to the mine asking the little men to help her find her way home, then pulls out 7 bags to kidnap each one of them. Only Dopey can escape from her claws by hiding behind rocks. Snow White, the Prince, and their 13-year old daughter Rose would've had to come to the rescue of the dwarfs with the help of Dopey.
There was also "Snow White Returns" which was a proposed sequel short to Snow White and the Seven Dwarfs. It would have incorporated deleted material from the film such as the famous Soup-Eating Scene and a sequence of the Dwarfs building a bed for Snow White. The unmade short is detailed on the Diamond Edition release of Snow White.