Les Misérables, or popularly referred to as “Les Mis”, is a musical based on the novel of the same name by French poet and playwright, Victor Hugo.

The music was composed by Claude-Michel Schönberg, and the lyrics were written by Alain Boublil and Jean-Marc Natel, with an English-language libretto by Herbert Kretzmer. Set in early 19th-century France, the plot follows the stories of many characters as they struggle for redemption and revolution.

Les Misérables opened at the Barbican Centre in London, England on 8 October 1985. It is the longest-running show in the West End, and the fifth longest-running show in Broadway history. In January 2010, it played its 10,000th performance in London, at Queen's Theatre in London's West End. On 3 October 2010, the show celebrated its 25th anniversary with three productions running in the same city: the original show at the Queen's Theatre in London's West End; the Twenty-Fifth Anniversary touring production at the original home of the show, the Barbican Centre; and the Twenty-Fifth Anniversary concert at London's O2 Arena.