The relationship between Jo Ellen Pellman’s Emma and James Corden’s Barry is a centerpiece of The Prom, and the actress believes they had some natural chemistry from the get-go. Pellman also gets some huge scenes with Nicole Kidman, Meryl Streep and the ensemble as well as the egotistical Broadway stars help her get ready to celebrate prom, amidst their protests. The movie also stars Keegan-Michael Key, Kerry Washington, Andrew Rannells and Tracey Ullman.