Alexander Lange Kielland (Norwegian: [ɑlɛˈksɑndər ˈlɑŋːə ˈçɛlːɑn]; 18 February 1849 – 6 April 1906) was one of the most famous Norwegian realistic writers of the 19th century. He is one of the so-called "The Four Greats" of Norwegian literature, along with Henrik Ibsen, Bjørnstjerne Bjørnson and Jonas Lie.