James Corden, Nicole Kidman, Meryl Streep and Keegan-Michael Key in The Prom. (Netflix) The Prom director Ryan Murphy has revealed that the most magical moment of the new Netflix musical wasn’t even in the script. Warning – mild spoilers follow. The Prom is loosely based on a true story, and follows a group of faded Broadway stars as they descend upon small-town Indiana to help Emma (Jo Ellen Pellman), a young lesbian teen denied the chance to attend her school prom with her same-sex date. After being duped by the duplicitous head of the PTA (Kerry Washington’s Mrs Greene), Emma and the troupe (Meryl Streep, Nicole Kidman, James Corden and Andrew Rannells) set about creating their own inclusive prom for all queer kids.