Screen-to-stage musical Sister Act is launching a TV advertising campaign next week (21 September 2009), and Whatsonstage.com Television has been given an exclusive preview of the ad (available to view below).

Sister Act opened at the London Palladium in June (See 1st Night TV, 6 Jun 2009). With the action transplanted to 1970s Philadelphia, it tells the story of disco diva Deloris van Cartier (the role created on screen by Whoopi Goldberg and played on stage by Patina Miller), who, after witnessing a murder and being put in protective police custody in a convent, brings some soul to the church choir, much to the initial consternation of the Mother Superior, played by Sheila Hancock (Maggie Smith in the film).

The musical has an original score by Alan Menken, best known for his work on Disney films like The Little Mermaid and Beauty and the Beast, with lyrics by his long-time collaborator Glenn Slater. The book is by Cheri and Bill Steinkellner.

The ad will air during Monday's episode of GMTV.