This 51st production of “The Nutcracker,” presented by Ballet Guild of the Lehigh Valley, Inc. and Pennsylvania Youth Ballet, features approximately one hundred cast members composed of dancers from Pennsylvania Youth Ballet and adult community volunteers, in addition to professional guest artists. This year’s production will be enhanced by live music, The Southside Sinfonietta, conducted by Eugene Albulescu, as well as a children’s choir, composed of Lehigh Valley school students.