Justin Jacob Long is an American actor and comedian. He is known for his film roles, particularly in comedy and horror films, notably appearing in Jeepers Creepers (2001), Dodgeball (2004), Herbie: Fully Loaded (2005), Accepted (2006), Idiocracy (2006), Dreamland (2006), Live Free or Die Hard (2007), Zack and Miri Make a Porno (2008), Drag Me to Hell (2009), He's Just Not That Into You (2009), Alpha and Omega (2010), The Wave (2019), and Barbarian (2022), as well as voicing Alvin Seville in the live-action Alvin and the Chipmunks film series. He is also known for his television appearances in Ed (2000–2004) and F Is for Family (2015–2021). He appeared with John Hodgman in TV commercials for Apple's "Get a Mac" campaign (2006–2009), and as himself in Intel's "Go PC" campaign.

Alpha and Omega is a 2010 American animated adventure film directed by Anthony Bell and Ben Gluck. Starring the voices of Justin Long, Hayden Panettiere, Dennis Hopper, Danny Glover and Christina Ricci, the film was written by Christopher Denk and Steve Moore, based on a story by Moore and Gluck. This film sets around two young Rocky Mountain wolves named Kate (Panettiere) and Humphrey (Long) who fall in love with each other, but are on the opposite ends of their pack. However, when Kate and Humphrey learn that they got relocated to Idaho for repopulation, they must work together to get back to Jasper National Park before a war slowly begins to emerge between both packs.