Kevin Conroy

Narrator (voice)

Neal Adams

Self

Will Arnett

Self

David Ayer

Self

Christian Bale

Self

Brian Bolland

Self

Alan Burnett

Self

Tim Burton

Self

Mike Carlin

Self

Bradley Cooper

Self

Dan Didio

Self

Paul Dini

Self

William Dozier

Self (archive footage)

Zach Galifianakis

Self

Maggie Gyllenhaal

Self

Mark Hamill

Self

Klaus Janson

Self

Geoff Johns

Self

Jenette Kahn

Self

Emma Tillinger Koskoff

Self

Heath Ledger

Self (archive footage)

Jim Lee

Self

Stan Lee

Self (archive footage)

Jared Leto

Self

Chris McKay

Self

Frank Miller

Self

Grant Morrison

Self

Jack Nicholson

Self

Christopher Nolan

Self

Jay Oliva

Self

Dennis O'Neil

Self

Todd Phillips

Self

Joaquin Phoenix

Self

Margot Robbie

Self

Jerry Robinson

Self (archive footage)

Andrea Romano

Self

John Stephens

Self

Emma Thomas

Self

Bruce Timm

Self

James Tucker

Self

Adam West

Self

Michael Uslan

Self

Cameron Monaghan

Jeremiah Valeska/The Joker (archive footage)