Which film would illustrate the Pygmalion effect?

The film "My Fair Lady" is a classic illustration of the Pygmalion effect, where a mentor transforms a character's identity through belief and expectation. In the story, Professor Henry Higgins believes that he can turn Eliza Doolittle, a flower girl with a strong Cockney accent, into a refined lady. His expectations and efforts lead to significant changes in her speech, behavior, and self-perception, showcasing how belief in someone's potential can profoundly impact their development.