Director Damien Chazelle’s La La Land is turning into quite the star-studded affair. Miles Teller Ryan Gosling and Emma Stone are leading the love story between a jazz pianist and an aspiring actress. J.K. Simmons and Emmy nominee Finn Wittrock (FX’s American Horror Story: Freak Show) are also on board, as is Your Sister’s Sister’s Rosemarie DeWitt, evidently. Now comes word that John Legend may be joining the cast.... Well look at that. Photo: JohnLegend.com.