Winners' names will be drawn two hours before the show.
The cast of Once features Arthur Darvill as Guy and Joanna Christie as Girl. The company also includes Adam Wesley Brown, Laurel Griggs, David Patrick Kelly, Jillian Lebling, Katrina Lenk, Anne L. Nathan, Lucas Papaelias, Andy Taylor, Carlos Valdes, Erikka Walsh, Paul Whitty and J. Michael Zygo.
"Featuring an impressive ensemble of actor/musicians who play their own instruments onstage, Once tells the enchanting tale of a Dublin street musician who's about to give up on his dream when a beautiful young woman takes a sudden interest in his haunting love songs," press notes state. "As the chemistry between them grows, his music soars to powerful new heights... but their unlikely connection turns out to be deeper and more complex than your everyday romance."
Once received eight 2012 Tony Awards, including Best Musical, and won the 2013 Grammy Award for Best Musical Theater Album. It is currently playing in London's West End and will begin a national tour in the summer of 2013.
Tickets and more information are available by visiting oncemusical.com.