The Phantom of the Opera, eventually the second longest running musical in London, opens at Her Majesty's Theatre.

The Phantom of the Opera is a musical by Andrew Lloyd Webber, lyrics by Charles Hart, additional lyrics by Richard Stilgoe, and a libretto by Lloyd Webber and Stilgoe. Based on the novel by Gaston Leroux, it tells the tragic story of beautiful soprano Christine Daaé, who becomes the obsession of a mysterious and disfigured musical genius living in the subterranean labyrinth beneath the Paris Opera House.

London is the capital and largest city of both England and the United Kingdom, with a population of 8,945,309 in 2023. Its wider metropolitan area is the largest in Western Europe, with a population of 15.1 million. London stands on the River Thames in southeast England, at the head of a 50-mile (80 km) tidal estuary down to the North Sea, and has been a major settlement for nearly 2,000 years. Its ancient core and financial centre, the City of London, was founded by the Romans as Londinium and has retained its medieval boundaries. The City of Westminster, to the west of the City of London, has been the centuries-long host of the national government and parliament. London grew rapidly in the 19th century, becoming the world's largest city at the time. Since the 19th century the name "London" has referred to the metropolis around the City of London, historically split between the counties of Middlesex, Essex, Surrey, Kent and Hertfordshire, which since 1965 has largely comprised the administrative area of Greater London, governed by 33 local authorities and the Greater London Authority.

His Majesty's Theatre is a West End theatre situated in the Haymarket in the City of Westminster, London. The building, designed by Charles J. Phipps, was constructed in 1897 for the actor-manager Herbert Beerbohm Tree, who established the Royal Academy of Dramatic Art (RADA) at the theatre. In the early decades of the 20th century Tree produced spectacular productions of Shakespeare and other classical works, and the theatre hosted premieres by such playwrights as Bernard Shaw, J. M. Synge and, later, Noël Coward and J. B. Priestley. Since the First World War the wide stage has made the theatre suitable for large-scale musical productions, and His Majesty's has accordingly specialised in hosting musicals. It has been home to record-setting musical theatre runs such as the First World War hit Chu Chin Chow and Andrew Lloyd Webber's The Phantom of the Opera, which has run at His Majesty's since 1986, except during the COVID-19 pandemic theatre closures.