Interactive theatre is a presentational or theatrical form or work that breaks the "fourth wall" that traditionally separates the performer from the audience both physically and verbally.
In traditional theatre, performance is limited to a designated stage area and the action of the play unfolds without audience members, who function as passive observers. Conversely, in interactive theatre, the performance engages directly with audience members, making them active participants in the piece. Interactive theatre often goes hand in hand with immersive theatre, which brings the audience into the same playing space as the performers. They may be asked to hold props, supply performance suggestions (as in improvisational theatre), share the action's real-world (non-theatrical) setting (as in site-specific theatre and immersive theatre), or become characters in the performance. They may also be asked to participate in altering the course of the play by collectively voting to steer the plot in a new direction, as with Augusto Boal's forum theatre. In therapeutic and educational settings, they may even be invited to discuss pertinent issues with the performers.