Sir Cameron Anthony Mackintosh is a British theatrical producer and theatre owner notable for his association with many commercially successful musicals. At the height of his success in 1990, he was described as being "the most successful, influential and powerful theatrical producer in the world" by the New York Times. He is the producer of shows including Les Misérables, The Phantom of the Opera, Cats, Miss Saigon, Mary Poppins, Oliver!, and Hamilton.

Les Misérables, colloquially known as Les Mis or Les Miz, is a sung-through musical with music by Claude-Michel Schönberg, lyrics by Alain Boublil and Jean-Marc Natel, and a book by Schönberg and Boublil, based on the 1862 novel of the same name by Victor Hugo. The original French musical premiered in Paris in 1980 with direction by Robert Hossein. Its English-language adaptation, with lyrics by Herbert Kretzmer, produced by Cameron Mackintosh, has been running in London since October 1985, making it the longest-running musical in the West End and the second longest-running musical in the world after the original Off-Broadway run of The Fantasticks. A film adaptation was released in 2012.