Robert De Niro Murray Franklin
Joaquin Phoenix Arthur Fleck
Bradley Cooper Producer
Zazie Beetz Sophie Dumond
Marc Maron Gene Ufland
Shea Whigham Detective Burke
Justin Theroux Ethan Chase (uncredited)
Brett Cullen Thomas Wayne
Frances Conroy Penny Fleck
Bill Camp Detective Garrity
Bob Kane Characters
Bryan Callen Haha's Stripper
Brian Tyree Henry Carl (Arkham Clerk)
Isabella Ferreira Flirting Woman on the Bus (uncredited)
Glenn Fleshler Randall
Frank Miller Thanks
Scott Silver Writer
John Cenatiempo Aftermath Police Officer, Stunts
Josh Pais Hoyt Vaughn
Todd Phillips Producer, Writer, Director
Bill Finger Characters
Hannah Gross Young Penny
Douglas Hodge Alfred Pennyworth
April Grace Arkham Psychiatrist
Airon Armstrong Stunt Double
Jeff Atmajian Orchestrator
James Ciccone Murray Franklin Band
Peter Epstein Stunts
George Drakoulias Music Supervisor
Edwin Rivera Visual Effects Supervisor
J. M. DeMatteis Thanks
Ray Iannicelli Haha's Clown
Leigh Gill Gary
Bruce Berman Executive Producer
Murphy Guyer Barry O'Donnell
Michael Uslan Executive Producer
Keith Giffen Thanks
Jerry Robinson Characters
Dan O'Connell Foley Artist
Frank Wood Dr. Stoner
Joel Weaver Assistant Property Master
Richard Duarte Foley Mixer
Geoffrey Haley "A" Camera Operator, Steadicam Operator
Jason Cloth Co-Executive Producer
Gregory Irwin First Assistant "A" Camera
Walter Hamada Executive Producer
Jeff Brink Special Effects Coordinator
Hildur Guðnadóttir Original Music Composer
Sharon Washington Social Worker
Sondra James Dr. Sally
Lawrence Sher Cinematography, Director of Photography
Ben Warheit Wall Street Three
Jill Bogdanowicz Digital Intermediate Colorist
Richard Burden Stunts
Thomas J. O'Connell ADR Mixer
Michael Benz Wall Street Three
Dante Pereira-Olson Bruce Wayne
John T. Cucci Foley Artist
Aaron L. Gilbert Executive Producer
Randall Poster Music Supervisor
Kay Georgiou Hair Department Head
Sam Morril Open Mic Comic
Tod A. Maitland Sound Mixer
Lena Glikson Music Editor
Blaise Corrigan Taxi Driver (uncredited)
Michael Scott Boom Operator
Keith Buterbaugh Band Leader
Michael Auszura Assistant Art Director
Larry Kaplan Unit Publicist
Steve Ramsey Chief Lighting Technician
Mark Friedberg Production Design
Carolina Jiménez Layout