Denny O'Neil in Joker: Put on A Happy Face (2020)

Grant Morrison in Joker: Put on A Happy Face (2020)

Paul Dini in Joker: Put on A Happy Face (2020)

Klaus Janson in Joker: Put on A Happy Face (2020)

Geoff Johns in Joker: Put on A Happy Face (2020)

Mike Carlin in Joker: Put on A Happy Face (2020)

Dan DiDio in Joker: Put on A Happy Face (2020)

Will Arnett in Joker: Put on A Happy Face (2020)

Zach Galifianakis in Joker: Put on A Happy Face (2020)

David Ayer in Joker: Put on A Happy Face (2020)

Jared Leto in Joker: Put on A Happy Face (2020)

Jerry Robinson in Joker: Put on A Happy Face (2020)

Jack Nicholson, Jared Leto, Joaquin Phoenix, Cesar Romero, and Heath Ledger in Joker: Put on A Happy Face (2020)

Adam West in Joker: Put on A Happy Face (2020)

Joaquin Phoenix in Joker: Put on A Happy Face (2020)

Heath Ledger in Joker: Put on A Happy Face (2020)

Cesar Romero in Joker: Put on A Happy Face (2020)

Jack Nicholson in Joker: Put on A Happy Face (2020)

Christian Bale in Joker: Put on A Happy Face (2020)

Joaquin Phoenix and Todd Phillips in Joker: Put on A Happy Face (2020)

Bruce Timm in Joker: Put on A Happy Face (2020)

Mark Hamill in Joker: Put on A Happy Face (2020)