
Justin Jacob Long (born June 2, 1978) is an American actor, comedian, director and screenwriter. He is known for his work in comedies (like Accepted and Dodgeball) and horror films (like Jeepers Creepers, Barbarian, and Weapons). In recent years, he has been labeled a scream king.
He has done voice roles as well, including as Alvin Seville in the live-action Alvin and the Chipmunks film series. He is also known for his personification of a Mac in Apple's "Get a Mac" advertising campaign (2006–2009), and appeared as himself in Intel's "Go PC" campaign.

Weapons
2025 · as Gary

Live Free or Die Hard
2007 · as Matt Farrell

Alvin and the Chipmunks
2007 · as Alvin (voice)

Idiocracy
2006 · as Doctor

Barbarian
2022 · as AJ

Jeepers Creepers
2001 · as Darius 'Darry' Jenner

Drag Me to Hell
2009 · as Clay Dalton

He's Just Not That Into You
2009 · as Alex

DodgeBall: A True Underdog Story
2004 · as Justin

Tusk
2014 · as Wallace Bryton

After.Life
2009 · as Paul

Alvin and the Chipmunks: The Squeakquel
2009 · as Alvin (voice)

Alvin and the Chipmunks: Chipwrecked
2011 · as Alvin (voice)

Jeepers Creepers 2
2003 · as Darius 'Darry' Jenner

Alvin and the Chipmunks: The Road Chip
2015 · as Alvin (voice)

Night Patrol
2026 · as Ethan Hawkins

Herbie Fully Loaded
2005 · as Kevin

Movie 43
2013 · as Fake Robin (segment "Super Hero Speed Dating")