Question: Princess Eilonwy, is a fictional character in Lloyd Alexander's "The Chronicles of Prydain", she also appears  in four of the five novels in the series, as well as Disney's 1985 animated film adaptation of which 1985 American animated dark fantasy adventure film?
Sentence (from "The Black Cauldron (film)"): The Black Cauldron is a 1985 American animated dark fantasy adventure film produced by Walt Disney Feature Animation in association with Silver Screen Partners II and released by Walt Disney Pictures.
Relevant evidence: Yes