Moon Child is a 2003 Japanese science fantasy horror action film starring Gackt, Hyde, and Leehom Wang. It was released on April 19 in Japan, and screened on May 13 at the Cannes Film Festival and on April 12, 2004, at Philadelphia Film Festival. In November 2023 for its 20th anniversary it was re-screened nationwide in Japan. The movie's story is adaptation of Gackt's original story related to his "Moon Saga" concept.