Konstantin Stanislavski was a Russian theater practitioner and actor, best known for developing a systematic approach to acting that emphasizes emotional authenticity and psychological realism. His techniques, often referred to as Method Acting, encourage actors to draw on their own experiences to create believable characters. Stanislavski co-founded the Moscow Art Theatre, where he implemented his innovative ideas about performance and rehearsal. His work has had a profound influence on modern acting, shaping the way actors approach their craft and inspiring countless performers around the world.