Lupita Nyong’o might have had the week of her life. After a memorable arrival at the Oscars in a pale blue Prada gown — and one of the night’s most articulate, heartfelt acceptance speeches for her Best Supporting Actress win — the “12 Years a Slave” star set off for the tail end of Paris Fashion Week. As the face of Miu Miu, Nyong’o was on hand for the fall show Wednesday and captured attention in the brand’s burgundy jacket and notched martini pumps. Joining her front row were Margot Robbie from “The Wolf of Wall Street” and pop star Rihanna. Other nearby celebs included Elizabeth Olsen and Elle Fanning.