The International Thespian Honor Society is a non-profit honorary organization for high school theatre students. Students earn membership into Denver Academy's troupe #6580 of the International Thespian Society through hours (points) spent working and acting in Denver Academy productions. Ten points (100 hours) are required for membership with a yearly induction ceremony in May.

Denver Academy's Thespian troupe annually attends the Colorado State Thespian Festival in downtown Denver at the Colorado Convention Center. Students that are inducted into this honor society help lead the theatre club every Thursday. For more information go to cothespians.com and schooltheatre.org.