Paul Giamatti

Harvey Pekar

Molly Shannon

Stage Actor Joyce

David Letterman

Self (archive footage)

Josh Hutcherson

Robin

Judah Friedlander

Toby Radloff

James Urbaniak

Robert Crumb

Ebon Moss-Bachrach

MTV Director

Kurt Loder

Self (archive footage)

Hope Davis

Joyce Brabner

Donal Logue

Stage Actor Harvey

Maggie Moore

Alice Quinn

Earl Billings

Mr. Boats

Shari Springer Berman

Writer

Robert Pulcini

Director

Madylin Sweeten

Danielle

James McCaffrey

Fred

Eytan Mirsky

Guitarist

Daniel Tay

Young Harvey

Vivienne Benesch

Lana

Harvey Pekar

Real Harvey

Joyce Brabner

Joyce Brabner

Toby Radloff

Toby Radloff

Joey Krajcar

Batman

Chris Ambrose

Superman

Cameron Carter

Green Lantern

Mary Faktor

Housewife