cast
-
Paul Giamatti
Harvey Pekar
-
Hope Davis
Joyce Brabner
-
Judah Friedlander
Toby Radloff
-
James Urbaniak
Robert Crumb
-
Earl Billings
Mr. Boats
-
James McCaffrey
Fred
-
Maggie Moore
Alice Quinn
-
Vivienne Benesch
Lana
-
Daniel Tay
Young Harvey
-
Harvey Pekar
Real Harvey
-
Donal Logue
Stage Actor Harvey
-
Josh Hutcherson
Robin
- Joyce Brabner Joyce Brabner
-
Molly Shannon
Stage Actor Joyce
-
Toby Radloff
Toby Radloff
- Eytan Mirsky Guitarist
- Joey Krajcar Batman
- Chris Ambrose Superman
- Cameron Carter Green Lantern
- Mary Faktor Housewife
-
Madylin Sweeten
Danielle
-
Ebon Moss-Bachrach
MTV Director
-
David Letterman
Self (archive footage)
-
Kurt Loder
Self (archive footage)
-
Shari Springer Berman
Interviewer (voice)
-
Larry John Meyers
Throat Doctor
- Barbara Brown Nurse
- Danny Hoch Marty
-
Eli Ganias
Pahls
-
Sylvia Kauders
Old Jewish Lady
- Rebecca Borger Cashier
- Nick Baxter Mattress Guy #1
- Allen Branstein Mattress Guy #2
- Dick Prochaska WWII Patient
- Charles Eduardos Doctor
-
Robert Pulcini
Bob the Director
- Bianca Santos Counter Girl
-
Mike Rad
Rand
-
Amy K. Harmon
Cheery Waitress
- Rob Grader Stage Manager
- Terrence Sullivan Letterman Regular
- Patrick Lafferty Yuppie
- Jesse Perez Miguel
- Jeff Peters Talk Show Host
- Ola Creston PA #1
- Robert J. Williams Cancer Doctor
-
Jason Stevens
Letterman Regular (voice)
- Todd Cummings Talk Show Host (voice)