For thirty years, movies were silent. Actors moved their lips, but no sound came out. A piano player sat in the theater and played music while the movie ran. Words appeared on screen to explain what was happening. Then on October 6, 1927, The Jazz Singer changed everything. It was the first major movie with synchronized sound. The audience heard actor Al Jolson sing and speak. His famous line was, "Wait a minute. You ain't heard nothing yet!" The crowd went wild. The movie used a system called Vitaphone. Large records played alongside the film, matching sound to the moving images. The technology was not perfect. Sometimes the sound did not match the actors' lips. But audiences did not care. They were thrilled to hear voices. Within two years, almost every movie studio switched to sound. Silent film stars who had thick accents or weak voices lost their careers overnight. New stars with strong, clear voices took their place. The transition from silent to sound was one of the fastest technology changes in entertainment history. Movies would never be silent again.