“The Prince is having a ball!” Minutes before showtime, Mark Morris gathered his actors together for their traditional pep talk and prayer. The chant following the prayer changes before every show, but the words before Sunday’s matinee were picked by Dustin Boatright, who played the Prince. The young actors at Family Theatre Warehouse, in Oklahoma City, performed Cinderella for the last time this year. For Lindsay Yeager, who played Cinderella, this weekend’s shows were her first chance to play the lead character in a play. “It’s fun.” she says of the role, “I get picked on by them (the step-sisters) but then we have fun afterward.” As they prepared for the show to start in a room filled with costumes and hairspray, the actors told me that most of them would be back first thing in the morning to start working on Annie Get Your Gun during Music Theatre Camp.