Dan Castellaneta

as Homer Simpson (voice)

as Homer Simpson / Barney Gumble (voice)

as Homer Simpson

as Homer Simpson (voice)

as Mr. Kenny

as Izzy

as Carlson

as Homer Simpson / Itchy / Barney / Abe Simpson / Stage Manager / Krusty the Clown / Mayor Quimby / Mayor's Aide / Multi-Eyed Squirrel / Panicky Man / Sideshow Mel / Mr. Teeny / EPA Official / Kissing Cop / Bear / Boy on Phone / NSA Worker / Officer / Santa's Little Helper / Squeaky-Voiced Teen (voice)

as Self

as De Mille

as Dick

as Alan Frakesh

as Stretch (voice)

as Mr. Mysterio / Woodenleg Wally (voice)

as Genie (voice)

as Homer Simpson / Willie / Grampa Simpson/ Kodos/ Various (voice)

as Professor Crank (voice)

as (archive footage)

as Thing One / Thing Two (voice)

as Human Cannonball

as Additional Voices (voice)

as Auctioneer / Horse Trader (voice)

as Self

as Homer Simpson / Abraham 'Grampa' Simpson (voice)

as Priest (voice)

as Neal

as Partlow

as Count Dracula (voice)

as Male Fan

as Slick Moeller

as Phil

as Genie (voice)

as Narrator (voice)

as George Agrande

as Man in Chair

as Brian