In this year¡¯s¡® Theme and Variations¡¯, we have prepared a little time travel through the history of the musical film from its advent in the 1920s when technological progress inspired the Sound Film to the time when musicals was at the forefront of Hollywood cinema¡¯s golden period. From the first sound film, The Jazz Singer to the first back stage musicals, The Broadway Melody, 42nd Street and Top Hat, a number of key Hollywood musicals released up to the 1940s will be showcased in this section. In addition, a historical overview of musical films spanning it birth in the 1920s to its decline with the fall of the studio system, and its recent resurgence will be presented in documentary Hollywood Singing and Dancing: A Musical History.