Robert De Niro Murray Franklin
Zazie Beetz Sophie Dumond
Bradley Cooper Producer
Joaquin Phoenix Arthur Fleck
Justin Theroux Ethan Chase (uncredited)
Brett Cullen Thomas Wayne
Brian Tyree Henry Carl (Arkham Clerk)
Shea Whigham Detective Burke
Todd Phillips Producer, Writer, Director
John Cenatiempo Stunts, Aftermath Police Officer
Bill Finger Characters
Frances Conroy Penny Fleck
Bill Camp Detective Garrity
Bob Kane Characters
Isabella Ferreira Flirting Woman on the Bus (uncredited)
Frank Miller Thanks
Glenn Fleshler Randall
Hannah Gross Young Penny
Josh Pais Hoyt Vaughn
Douglas Hodge Alfred Pennyworth
Kris Moran Set Decoration
April Grace Arkham Psychiatrist
Bryan Callen Haha's Stripper
Keith Giffen Thanks
Sharon Washington Social Worker
Scott Silver Writer
Marc Maron Gene Ufland
Dean A. Zupancic Sound Re-Recording Mixer
Jerry Robinson Characters
Emma Tillinger Koskoff Producer
Dan O'Connell Foley Artist
Jeff McCarthy NCB Anchor
Chris Redd Comedy Club Emcee
Sondra James Dr. Sally
Thomas J. O'Connell ADR Mixer
Frank Wood Dr. Stoner
Murphy Guyer Barry O'Donnell
John T. Cucci Foley Artist
Geoffrey Haley "A" Camera Operator, Steadicam Operator
Leigh Gill Gary
Jill Brown Stunts
Bruce Berman Executive Producer
Airon Armstrong Stunt Double
Chris Cenatiempo Stunts
Brendan Patrick Connor Mr. Slotnick (uncredited)
Michael Uslan Executive Producer
Peter Epstein Stunts
Aaron L. Gilbert Executive Producer
Steven John Brown Stunts
Hildur Guðnadóttir Original Music Composer
Blaise Corrigan Taxi Driver (uncredited)
Lawrence Sher Director of Photography, Cinematography
G.A. Aguilar Stunt Coordinator
Alan Robert Murray Supervising Sound Editor
Walter Hamada Executive Producer
Jason Ruder Supervising Music Editor
Dennis Jay Funny Gotham Citizen (uncredited)
Kira Roessler Supervising ADR Editor, Supervising Dialogue Editor
Ryan Robert Howard Second Second Assistant Director
Tony D. Head WGC Anchorman
J. M. DeMatteis Thanks
Tod A. Maitland Sound Mixer
Randall Poster Music Supervisor
Mark Bridges Costume Design
Monica Ruiz-Ziegler Costumer
Brice R. Parker Visual Effects Producer
Jeff Groth Editor
Gary Gulman Comedian
George Drakoulias Music Supervisor
Mick Szal Woman on Subway
Michael Benz Wall Street Three
Adrienne Acevedo Lovette Middle Aged Woman (uncredited)