Theatre practitioners are key and have influence over every piece of classical or modern theatre shown to date. A theatre practitioner is, quite basically, someone who both creates theatre on stage and incorporates a particular/ noticable style throughout their practical work always in order to achieve a desired aim.
Taking this, we can establish that many practitioners use their individual methods in order to create a platform for which the audience are totally engaged to the performance and the elements that the practitioners create. This contributes to their overall aim (E.G. For the audience to feel sympathy for a certain character or Question the undertone of a political/social message in a piece of theatre) allowing them to successfully manipulate the theatrical environment and really un-pick a piece of theatre.
Some notable practitioners include the likes of; Stanislavski 'Stanislavski's system' (who is devoted to the superobjective understanding of a characters deeper internal emotions and how these can be communicated to the audience through body language, facial expressions etc. enforcing the idea of the forth wall) as well as Brecht 'Epic theatre', (who in contrast often aims to alienate the audience from the idea that they are watching a performance at all in order to highlight a key element, without the distraction of material theatre).