Ron Livingston

as Roger Perron

as Dr. Sebastian Charles

as Oliver Sullivan

as Henry Allen

as Lewis Nixon

as Ethan

as Peter

as Marty Bowen

as Gomez

as Bob Memari (voice)

as Jack Berger

as Caldwell

as Drew Moreau

as Roy Phillips

as Henry Wright

as Franklin Crudstaff

as Chris

as Rob

as Will Broderick

as Bobby Lawrence

as Self

as David Lipsky's Editor

as Future JR Maguire (voice only)

as Paul

as Flag Pin

as Kyle Walker

as Clerk (voice)

as David Anderson

as Larry Sokolov

as James Hosty

as Derek

as Mac Kamen (voice)

as Mark Wallace

as Peter Waxman (voice)

as Charles

as Trent

as Self

as Self

as Self - Guest

as Bob

as Keith

as Jon Dixon

as Percy Anderson

as Self

as Howard Fornoy

as Ben

as James

as Sam Loudermilk

as Rick (segment "The Honeymoon") / RV Driver (segment "The Campfire")

as Tyler Bellows

as Self

as Donnie Anderson

as Edwin

as Richard

as Self

as Alan Lowe

as Fred

as Maddux Donner

as Himself

as Blake

as Self - Guest

as Eric Gatley (uncredited)

as Soldier

as Adrian

as Francois

as Dr. Richard Clayton

as Richard Pimentel

as Alex Myers

as Pete

as Elvis Presley

as Charles Scheffel (voice)

as Johnny

as Allen Ginsberg

as John Carver

as Uncle Charlie

as Mr. Bricker

as Sydney Stein

as Dr. Liberman

as Patrick

as Self

as Matt Flannery

as Self

as Sheldon Buckle

as Marty Sachs

as Bob Kaplan

as Chad

as Andrew

as Self

as Ron Statlin

as Self

as Self

as Self

as Ron

as Curt

as Dr. Bannister

as Ron Livingston

as Self - 'Henry Allen'

as Captain Wonder

as Jim Lamson

as Self

as Rance McCoy

as Self

as Narrator

as Narrator

as Larry

as Mark Severson

as Self