Influenced by Miyazaki's opposition to the United States' invasion of Iraq in 2003, the film contains strong anti-war themes. She encounters a wizard named Howl and gets caught up in his resistance to fighting for the king. It tells the story of Sophie, a young milliner who is turned into an elderly woman by a witch who enters her shop and curses her. The film is set in a fictional kingdom where both magic and early twentieth-century technology are prevalent, against the backdrop of a war with another kingdom. The Japanese voice cast featured Chieko Baisho and Takuya Kimura, while the English dub version starred Jean Simmons, Emily Mortimer, Lauren Bacall, Christian Bale, Josh Hutcherson and Billy Crystal.

The film was produced by Toshio Suzuki, animated by Studio Ghibli and distributed by Toho. It is loosely based on the 1986 novel of the same name by British author Diana Wynne Jones. Howl's Moving Castle ( Japanese: ハウルの動く城, Hepburn: Hauru no Ugoku Shiro) is a 2004 Japanese animated fantasy film written and directed by Hayao Miyazaki.