Jimmy
Walt Berkman
Jesse Eisenberg
Benjamin
Jamison
Nick
Daniel Cheston
Mills
Mark Zuckerberg
Nick Davis
Sam Gold
Daniel
James Brennan
Blu (voice)
Columbus
Charlie Banks
Jack
The Boy
Mark
J. Daniel Atlas
Tex
Eric Dobbs
Simon James / James Simon
Eric Dobbs (archive footage)
Josh Stamos
Eli
Lex Luthor
Narrator
David Lipsky
Mike Howell
David
Young Male
Jonah Reed
Bobby Dorfman
Self
Louis Masoudi
Lex Luthor (uncredited)
Casey
Vincent Zaleski
Marcel
Self / Mark Zuckerberg
Tom
Lt. Fiske Hanley / Sgt. Benjamin McKinney
Jerry
David Brewster
Ralphie
Self - Guest
Self - Host
Toby Fleishman
Self - Presenter
Self - Cameo (uncredited)
Eric Neal (voice) (uncredited)
Kenny Green
Asher