According to the book and movie titles, the devil wears Prada. The phrase comes from Lauren Weisberger’s 2003 novel *The Devil Wears Prada* and its 2006 film adaptation, both centered on the demanding fashion-magazine editor Miranda Priestly and her assistant, Andy Sachs.
Prada is an Italian luxury fashion house founded in Milan in 1913 by Mario Prada. Its name in the title signals elite, expensive fashion and helps establish the world of Runway, the fictional magazine where much of the story takes place. The film’s costumes include many real designer labels, but Prada remains the title’s specific and canonical answer.
A common mix-up is assuming that every outfit in the movie is Prada. Costume designer Patricia Field assembled clothing and accessories from numerous designers, including Chanel, Valentino, Dolce & Gabbana, and others. The title is a memorable shorthand for the story’s high-fashion setting, not a claim that Miranda or Andy wears only one label.
The novel was inspired partly by Weisberger’s experience working as an assistant at *Vogue* under editor Anna Wintour, though the characters and plot are fictionalized. The movie stars Meryl Streep as Miranda Priestly and Anne Hathaway as Andy Sachs.