Both Gomez and Cyrus are former Disney stars.
Sony Pictures Animation, the production studio, would not comment on why Cyrus was leaving the film. Her representative did not immediately return a request for comment. An model of the Mavis character is available on our Hotel Transylvania picture page.
It was revealed last November that Cyrus had joined the voice cast.
In Hotel Transylvania, Dracula (voiced by Sandler) operates a five-stake resort where monsters and their families can live it up, free from meddling from the human world. Overprotective of his daughter, Dracula fabricates tales of elaborate dangers to dissuade her adventurous spirit.
Also starring are Saturday Night Live’s Andy Samberg, Cee Lo Green (as Murray the Mummy) and Kevin James (as Frankenstein). The movie is scheduled for release September 21.
Other cast members include Fran Drescher (The Bride of Frankenstein), David Spade (The Invisible Man), David Koechner (Quasimodo), and Steve Buscemi and Molly Shannon as a pair of werewolves.
Genndy Tartakovsky (Star Wars: Clone Wars) is the movie’s director.