Stephenie Meyer has named Mormonism as her greatest influence. However, according to actor Robert Pattinson, Meyer did not intend to include Mormon references in the novels and films. Yet professor of film and religion Angela Aleiss noted numerous clear influence of Mormonism in the "Twilight" series. Meyer has said, "Unconsciously, I put a lot of my basic beliefs into the story. Free agency is a big theme." Meyer cited BYU professor Steven Walker as having influenced her work. She explained that he revealed a new way for her to see and study literature which impacts her writing.