Vladimir Propp was a literary critic who developed a narrative theory outlining six character types common in storytelling: the villain, dispatcher, princess/prize, donor/helper, hero, and false hero. His ideas have influenced filmmakers across various genres, suggesting all narratives, including fairy tales and thrillers, follow a similar structure. Propp's character theory illustrates how these roles interact, as exemplified by examples from well-known films like 'The Dark Knight' and 'Titanic.'