Konstantin Sergeyevich Stanislavsky (né Alexeyev; Russian:Константи́н Серге́евич Станисла́вский; also transliterated as Constantin Stanislavski; 17 January [O.S. 5 January] 1863 –7 August 1938) was a Russian actor and theatre director. The Stanislavsky system would inspire numerous acting teachers in America whose teachings became a dominant force in film acting, especially in the period after World War II.