
They are also used to provide the content of the fictional operas that are taking place within the show itself, viz., Hannibal, Il Muto, and the Phantom's masterwork, Don Juan Triumphant. The full-fledged operatic passages are reserved principally for subsidiary characters such as Andre and Firmin, Carlotta, and Piangi. Inspired in part by an earlier musical version of the same story by Ken Hill, Lloyd Webber's score is sometimes operatic in style but maintains the form and structure of a musical throughout. Phantom is primarily a sung-through musical with very little spoken dialogue. Some of Stilgoe's original contributions are still present in the final version nevertheless. However, Charles Hart, a young and then-relatively unknown lyricist, later rewrote many of the lyrics, along with original lyrics for "Think of Me". Richard Stilgoe, the lyricist for Starlight Express, was then hired and wrote most of the original lyrics for the show.

Alan Jay Lerner was then recruited, but he became seriously ill after joining the project and was forced to withdraw none of his contributions (mostly involving the song "Masquerade") are credited in the show. Lloyd Webber first approached Jim Steinman to write the lyrics because of his "dark obsessive side", but he declined in order to fulfill his commitments on a Bonnie Tyler album. Then with the Phantom, it was there!" Lyricists Later, in New York, Lloyd Webber found a second-hand copy of the original, long-out-of-print Leroux novel, which supplied the necessary inspiration to develop a musical: said Lloyd Webber, "I was actually writing something else at the time, and I realised that the reason I was hung up was because I was trying to write a major romantic story, and I had been trying to do that ever since I started my career.

They screened both the 1925 Lon Chaney and the 1943 Claude Rains motion picture versions, but neither saw any effective way to make the leap from film to stage. He was aiming for a romantic piece, and suggested Gaston Leroux's book The Phantom of the Opera as a basis. In 1984, Lloyd Webber contacted Cameron Mackintosh, the co-producer of Cats and Song and Dance, to propose a new musical.

The musical opened in London's West End in 1986 and on Broadway in New York in 1988, in a production directed by Harold Prince and starring English classical soprano Sarah Brightman (Lloyd Webber's then-wife) as Christine Daaé, and Michael Crawford as the Phantom. Based on the 1910 French novel of the same name by Gaston Leroux, it tells the story of a beautiful soprano, Christine Daaé, who becomes the obsession of a mysterious, masked musical genius living in the subterranean labyrinth beneath the Paris Opéra House. The Phantom of the Opera is a musical with music by Andrew Lloyd Webber, lyrics by Charles Hart, and a libretto by Lloyd Webber and Richard Stilgoe.
