The musical film genre, with its vibrant integration of song, dance, and narrative, stands as a distinctive and influential form of cinematic expression. Originating in the early 20th century, musical films have evolved through various phases, mirroring changes in musical styles, societal norms, and technological advancements. This entry explores the historical development, defining characteristics, and key milestones of the musical film genre, highlighting its impact on both the film industry and broader culture.