According to The Hollywood Reporter, Meryl Streep has signed on to star in the upcoming fashionista comedy The Devil Wears Prada. The movie is based on Lauren Weisberger’s best-selling novel about a young woman who goes to New York to work for an all-powerful magazine editor named Miranda Priestly (Streep). Weisberger did a stint as an assistant to Vogue editor Anna Wintour.