Mamma Mia! is a jukebox musical with a book by British playwright Catherine Johnson, based on the songs of ABBA, composed by Benny Andersson and Björn Ulvaeus, former members of the band. It was an early example of the jukebox musical genre and helped to popularize the form. Although the title of the musical is taken from the group’s 1975 chart-topper Mamma Mia, the plot is fictional, not biographical.
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Björn Ulvaeus and Benny Andersson, who composed the original music for ABBA, were involved in the development of the show from the beginning. Anni-Frid Lyngstad has been involved financially in the production, while Agnetha Fältskog has not, though she was present at the Swedish premiere and final show.
The musical includes such hits as “Super Trouper“, “Dancing Queen“, “Knowing Me, Knowing You“, “Take A Chance On Me“, “Thank You for the Music“, “Money, Money, Money“, “The Winner Takes It All“, “Voulez Vous“, “I Have a Dream” and “SOS“. It had been seen by over ten million people worldwide as of July 2003. Estimates in 2007 bring the number to 30 million. Since its opening in 1999, the production has grossed US $2.0 billion in earnings. 
A stage-to-film adaptation, Mamma Mia! The Movie, starring Meryl Streep, Colin Firth, Pierce Brosnan, Amanda Seyfried, Christine Baranski and Julie Walters was released in July 2008.
Another jukebox musical, Never Forget, was described by The Guardian described as “Take That‘s own Mamma Mia!.”