│Light, my light, the world-filling light, the eye-kissing light, heart-sweetening light!│

Miss Saigon is a West End musical by Claude-Michel Schönberg and Alain Boublil, with lyrics by Boublil and Richard Maltby, Jr. It is a modern adaptation of Giacomo Puccini's opera Madame Butterfly, and similarly tells the tragic tale of a doomed romance involving an Asian woman abandoned by her American lover. The setting of the plot is relocated to the 1970s Saigon during the Vietnam War, and Madame Butterfly's American Lieutenant and Japanese geisha coupling is replaced by a romance between an American GI and a Vietnamese bar girl.

It premiered at the Theatre Royal, Drury Lane, in London on September 20 1989, closing after 4,264 performances on October 30 1999. It opened at the Broadway Theatre in New York City in 1991. It subsequently opened in many other cities and embarked on tours.

The musical represented Schönberg and Boublil's second major success, following Les Misérables in 1980. As of April 2009, Miss Saigon is still the 10th longest-running Broadway musical in musical theatre history.