This document provides an overview of several popular musical productions in London's West End theatre district. It introduces Mamma Mia, a musical set to the music of ABBA that tells the story of a young woman trying to determine which of three men is her father. It also briefly summarizes War Horse, a musical about a boy and his horse during World War I, and Les Miserables, a long-running musical adaptation of the Victor Hugo novel set during the French Revolution. It discusses the work of prominent musical theatre producers Andrew Lloyd Webber and Cameron Mackintosh, noting some of their most famous productions.