Konstantin Stanislavski was a Russian theater practitioner and actor, born in 1863. He is best known for developing the Stanislavski System, a method of acting that emphasizes emotional authenticity and psychological realism. His approach encourages actors to draw from their own experiences to create believable characters. Stanislavski co-founded the Moscow Art Theatre in 1898, where he implemented his techniques. His work significantly influenced modern acting and theater, shaping the practices of many renowned actors and directors. His legacy continues to impact the performing arts, making him a pivotal figure in the history of theater.