Courtesy Photo The cast of Once Upon a Mattress in costume Brownsboro High School theater students prepare for the upcoming musical, Once Upon a Mattress. The students have been working hard in preparation for the big show, which will happen November 22 and again on November 23. The cost to attend is a single canned food item. The students and Theater Director David Young are excited about the upcoming musical and hope to pack Brownsboro's theater on the night of the performance and the following day.