That's a good question. Sally is one of the main characters in the 1993 film "The Nightmare Before Christmas." She is a rag doll who was created by Jack Skellington, the Pumpkin King of Halloween Town. Sally is one of the most popular characters from the film and is often portrayed as a kind and caring character who wants to help others. Sally has also appeared in various merchandise and other adaptations of the film, such as video games and comics. So, to answer your question, the actress who voices Sally in the film is Catherine O'Hara.