1) Strong story and characters: The musical tells the heartwarming and inspiring story of Billy, a young boy from a working-class family in northern England who discovers a passion for ballet. Billy's journey is both touching and uplifting, and the characters are all well-developed and relatable.
2) Beautiful music and choreography: The music of Billy Elliot is simply stunning, and the choreography is equally impressive. The show's songs are memorable and catchy, and the dance numbers are visually spectacular.
3) Talented cast: The original cast of Billy Elliot included a number of talented young performers, including Jamie Bell as Billy, Adam Cooper as Mr. Elliot, and Ruthie Henshall as Mrs. Wilkinson. The cast's performances were universally praised, and they helped to bring the characters to life.
4) Critical acclaim: Billy Elliot received rave reviews from critics, who praised the show's story, music, choreography, and performances. The show won numerous awards, including 10 Tony Awards and five Olivier Awards.
5) International success: Billy Elliot has been a success not only in the UK, but also around the world. The show has been produced in over 30 countries, and it has been translated into more than 20 languages.
Overall, Billy Elliot the musical is a success because it is a well-crafted show with a strong story, beautiful music and choreography, a talented cast, and critical acclaim. The show has resonated with audiences around the world, and it continues to be a popular choice for theatergoers.