Improvisational Theatre, often referred to as improv, is a form of live theatre where most or all of what is performed is created spontaneously by the performers. This art form relies heavily on the actors' ability to think quickly and creatively, often using audience suggestions to inspire scenes and characters. The lack of a script allows for a unique and unpredictable experience each time a performance is held. Improv can take many forms, from short games to long-form narratives, and is often characterized by its emphasis on collaboration and support among performers. Notable improv groups, such as The Second City and Upright Citizens Brigade, have popularized this genre, showcasing its potential for humor and storytelling without a predetermined script.