Extension follows a celebrity-filled sell out opening.

Cameron Mackintosh’s revival of the classic Schönberg-Boublil musical Miss Saigon, which recently opened at the West End’s Prince Edward Theatre, has now extended its booking period to April 25, 2015. It was originally booking through to October 25, 2014.

The musical has attracted record-breaking advance bookings, which are reportedly from an ‘incredibly young’ audience who had not seen the show when it ran previously. The production broke the record for the largest single day of sales in West End and Broadway history when it went on sale last September, with takings of £4.4m on the first day.

This was far ahead of the amount taken by The Book of Mormon, which set the previous record in March 2013 when it took £2.1m in one day. The musical opened on Wednesday, May 21 to a packed audience including a number of celebrities. Attendees included Stephen Fry, Miranda Hart and film director Tom Hooper.

Miss Saigon is based on Giacomo Puccini’s opera Madame Butterfly, with music by Claude-Michel Schönberg and lyrics by Alain Boublil and Richard Maltby, Jr. It tells the story of an orphaned Vietnamese girl who falls in love with an American GI during the final days of the American occupation of Saigon.

Miss Saigon premiered at the West End’s Theatre Royal, Drury Lane in 1989 and ran for 10 years to 1999. The role of The Engineer is played by Jon Jon Briones, who was in the original 1989 London cast as part of the ensemble.