Since 1957, The Theater Program has produced a fall play and a spring musical to entertain the CM community.
Students audition for various roles and spend six to eight weeks rehearsing. Performances are usually Thursday and Friday evenings, with a Saturday matinée. The club offers a variety of theatrical genres over time -- comedy, mystery, drama, etc. -- so that student actors gain broad experience as performers.
The Theatre Program is the only co-ed club at CM, with the female roles being played by local students from schools such as Fontbonne Academy, Montrose School, and Ursuline Academy.
The CM Stage Crew creates and operates the scenery for the school play and other major events. This incudes building and painting sets and setting up and operating the sound system. The club meets regularly weekly after school and more often as needed in preparation for performances and events.