This document summarizes the history and methods of acting in theater. It discusses the origins of acting with Thespis in 554 BC and the development of methodological actor training in the late 19th century to ensure consistent performances. The two main theoretical approaches are the internal method, which uses personal experiences to internalize a character's emotions, and the external method pioneered by Stanislavsky, which uses techniques like body language to convey emotions without actually feeling them. The document also distinguishes between representational acting, where actors pretend to be the character, and presentational acting, where actors present the character to the audience without fully becoming the character.