Who played Elton John in 'Rocketman'?

Who played Miranda Priestly in 'The Devil Wears Prada'? Who played Andy Sachs in 'The Devil Wears Prada'? In which film is Andy Sachs a character? In which film is Cher Horowitz a character? In which film is Elton John a character? Who played Bob Dylan in 'A Complete Unknown'? In which film is Bob Dylan a character? Who played P.T. Barnum in 'The Greatest Showman'?