Question: who were the professional dancers in center stage?
Answer: Of the main characters who are dancers, four are professional ballet dancers (Amanda Schull, Ethan Stiefel, Sascha Radetsky, and Julie Kent), one is a professional figure skater (Ilia Kulik), one had ballet training (Zoe Saldana), and two were actors with no ballet training (Susan May Pratt and Shakiem Evans).