“For [director Damien] Chazelle, it took time to find the right choreographer. ‘We needed someone who was comfortable with modern dance forms and popular dancing, but also either came from or had experience in the ballet world,’ he said. He also wanted someone who appreciated Fred Astaire and Ginger Rogers … ‘We needed someone who had experience with cameras,’ he continued, ‘and who had experience with nonprofessional dancers. Mandy Moore wound up being that one person.'”