Elton John gives fans a preview of his new songs written for The Devil Wears Prada: The Musical

Sir Elton John is mixing his musical prowess and passion for fashion for The Devil Wears Prada: The Musical.

In a sneak peek, the Rocket Man has previewed some of his new music for the upcoming show, based on the novel by Lauren Weisberger and the 2006 movie of the same name starring Anne Hathaway and Meryl Streep.

"It's one of my favourite films and the subject matter in the film screams out for music, as well," says John.

"But I just thought, 'You have to have characters that you can write [songs] for, and you have to have a backdrop which can inspire you musically,' and the film does."

He also promised that theatregoers will "walk out elated" when they see the production.

In the video, the 75-year-old music legend performs snippets from the musical's tracks 'Dress Your Way Up,' 'When a Legend Is Born' and, of course, 'The Devil Wears Prada.'

The musical stars Tony-winning actress Beth Leavel as Streep's Miranda Priestly, head of Runway magazine, with Taylor Iman Jones stepping into Hathaway's Chanel boots in the role of the up-and-coming writer Andy Sachs.