‘The Devil Wears Prada 2’ Best Fashion: How the Sequel Pulled Off Andy’s Cerulean Sweater, Miranda’s Balenciaga Gown and Emily’s Dior Outfit 20th Century Fox SPOILER WARNING: This story discusses plot details for “ The Devil Wears Prada 2 ,” in theaters now. After reading the script for “ The Devil Wears Prada 2 ,” costume designer Molly Rogers had one thought, “I have to put the cerulean blue sweater in 2.” It was the first call she put into 20th Century Studios, and director David Frankel agreed. It seemed right that the sweater would be honored after the original’s monologue about Andy’s basic cable-knit sweater evolved into its own cultural moment. Meryl Streep, as Runway’s editor-in-chief Miranda, Emily (Emily Blunt) and Andy (Anne Hathaway) effortlessly slip back into their roles, and Rogers was eager to dress them knowing there are high expectations. She knew where to put the cerulean sweater.…