Vector (voice)
Nobody
Dane Faucheux
Henry
Will Harbor
Himself
David Foster Wallace
Jay
Himself (uncredited) / Jason Segel (uncredited)
Jason
Tom Solomon
Gary
Brice (uncredited)
Russell Gettis
Sydney Fife
Horatio
Vector (voice)
Sydney Fife
Peter Bretter
Jason
Frat Boy #1 (uncredited)
Theodore Everest
Smelly Bob
Jason
Leon
Sam Schechter
Gary Huffman
Mike