David Llewelyn Wark "D. W." Griffith (January 22, 1875 – July 23, 1948) was a premier pioneering American film director. He is best known as the director of the Ku Klux Klan epic 1915 film The Birth of a Nation and the subsequent film Intolerance (1916).

Griffith's film The Birth of a Nation made pioneering use of advanced camera and narrative techniques, and its immense popularity set the stage for the dominance of the feature-length film. It also proved extremely controversial at the time and ever since for its negative depiction of African Americans and White anti-racists, and its positive portrayal of slavery and the Ku Klux Klan. The film was lauded by political notables such as President Woodrow Wilson, who supposedly declared that the film was "history written in lightning", but was subject to boycotts by anti-racist organizations such as the NAACP. Griffith responded to his critics with his next film, Intolerance, intended to show the dangers of prejudiced thought and behavior. The film was not the financial success that its predecessor had been, but was received warmly by critics. Several of his later films were also successful, but high production, promotional, and roadshow costs often made his ventures commercial failures. Even so, he is generally considered one of the most important figures of early cinema.