Atlas Shrugged Part III: Who Is John Galt? is a 2014 American science fiction-drama film based on the philosopher Ayn Rand's 1957 novel Atlas Shrugged. It is the third installment in the Atlas Shrugged film series and the sequel to the 2012 film Atlas Shrugged: Part II, continuing the story where its predecessor left off. The release, originally set for July 4, occurred on September 12, 2014. The film used a completely different cast and crew from the second film, which itself used a completely different cast from the first film. Directed by J. James Manera, it stars Laura Regan, Kristoffer Polaha, and Joaquim de Almeida.

Atlas Shrugged is a 1957 novel by Ayn Rand. It is her longest novel, the fourth and final one published during her lifetime, and the one she considered her magnum opus in the realm of fiction writing. She described the theme of Atlas Shrugged as "the role of man's mind in existence" and it includes elements of science fiction, mystery and romance. The book explores a number of philosophical themes from which Rand would subsequently develop Objectivism, including reason, property rights, individualism, libertarianism and capitalism, and depicts what Rand saw as the failures of governmental coercion. Of Rand's works of fiction, it contains her most extensive statement of her philosophical system.