The September 2016 issue demonstrates how, under the right circumstances, stylish moments can happen almost anywhere, just about anytime, and to practically anybody. Shot partly in a desanctified church in Marylebone, London, on a cold, rainy day, and partly in a Norma Desmond–era mansion in Silver Lake, Los Angeles, during a record-shattering heat wave, “A Vintage Collection” (page 208) showcases 11 of Vanity Fair’s favorite up-and-comers. “The overall concept,” V.F. creative director (fashion and style) Jessica Diehl explains, “was to assign to each young actor a style profile relating to a particular decade. The results are more like a collection of portraits than a fashion story.” Willowy Elizabeth Debicki, for example, languidly channels the silent-film sirens of the 1920s, while Riley Keough, poured into a Fendi baby-doll mini, evokes the…