Hey Arnold!: The Movie is a 2002 American animated adventure comedy film based on the Nickelodeon animated television series of the same name. Directed by Tuck Tucker and written by series creator Craig Bartlett and Steve Viksten, with music by series composer Jim Lang, the film stars Spencer Klein, Francesca Smith, Jamil Walker Smith, Dan Castellaneta, Tress MacNeille, Paul Sorvino, and Jennifer Jason Leigh, and follows Arnold, Gerald, and Helga on a quest to save their neighborhood from a greedy developer who plans on converting it into a huge shopping mall. The events of the film take place during the series' fifth and final season.

Daniel Louis Castellaneta is an American actor and comedian. He is best known for voicing Homer Simpson on the animated series The Simpsons. Castellaneta is also known for voicing Grandpa in Nickelodeon's Hey Arnold!, and has had voice roles in several other programs, including Futurama, Sibs, Darkwing Duck, The Adventures of Dynamo Duck, The Batman, Back to the Future: The Animated Series, Aladdin, Earthworm Jim, and Taz-Mania.