Walt Disney never allowed the actress who played Snow White to make another film.

An early publicity still for Snow White and the Seven Dwarfs,
signed by Adriana Caselotti, right.

Actress Adriana Caselotti did not even receive credit for appearing in Snow White and the Seven Dwarfs! These tactics were not some strange form cruelty on the part of Walt Disney, however - Disney thought the illusion of Snow White would be ruined if the public knew which actress had provided her voice. Caselotti was under contract with the Disney Studio, so it was legally his right to make such a choice.

And let’s not forget - Snow White was the first feature-length animated film to be produced in the United States. This means that there was no precedent for how to treat voice actors. Therefore, Walt had a perfectly logical argument in thinking that cartoon voice actors should remain obscure in order to preserve the magic behind their onscreen characters!

Source: AnimatorMag