Devon Bostick

as Seth Neddermeyer

as Jasper Jordan

as Silver

as Derek

as Brent

as Donald Ireland

as High School Student #4

as Roy Gray

as Brian

as Rodrick Heffley

as Devon

as Rodrick Heffley

as Mark Goodman

as Rodrick Heffley

as Alan

as Joaquin

as Ponch

as Oscar Brunner

as Zachary Clark Wells

as Boy

as Jimmy

as Miles

as Ryan Johnson

as Martin Bentz

as Green (uncredited)

as Adam

as Dean Taylor

as Ezio Auditore da Firenze

as Renaldo

as Bennie

as Casper Galloway

as Nic

as Mike

as Leo Strange

as Lucas

as Older Boy

as Simon

as Young Kid

as Screaming Kid

as Archie Webber

as Freddy Klein

as Guard #1

as Teen Marvin

as Gothic Teen / Joey Grossman

as Ben (Teenager)

as Fireman's Son

as Luke

as Benjamin Decada

as Greg

as Billy Mitchell

as Darren Mason

as Young Bobby

as Maurie Balfour

as The Kid

as Christopher

as Nate

as Low Man

as Wallace Shawn (voice)

as Rodrick Heffley (voice)

as Mark, 14 yrs.

as Drew

as Green

as Mary's Son

as Green

as Ezio Auditore

as Mark

Role: Screenplay

as Adam

Role: Executive Producer