Final Fantasy: The Spirits Within is a 2001 adult animated science fiction film directed by Hironobu Sakaguchi, creator of the Final Fantasy franchise. It was the first photorealistic computer-animated feature film and the most expensive video game-inspired film until the release of Prince of Persia: The Sands of Time in 2010. The film stars the voices of Ming-Na Wen, Alec Baldwin, Donald Sutherland, James Woods, Ving Rhames, Peri Gilpin, and Steve Buscemi, and follows scientists Aki Ross and Doctor Sid in their efforts to free a post-apocalyptic Earth from the Phantoms, a mysterious, deadly alien race who has driven the remnants of humanity into "barrier cities". Aki and Sid must fight against General Hein, who wants to use more violent means to end the conflict.

Hironobu Sakaguchi is a Japanese game designer, director, producer, and writer. Originally working for Square from 1983 to 2003, he departed the company and founded independent studio Mistwalker in 2004. He is known as the creator of the Final Fantasy franchise, in addition to other titles during his time at Square. At Mistwalker, he is known for creating the Blue Dragon and Terra Battle series among several standalone titles, moving away from home consoles and creating titles for mobile platforms.