Robert De Niro Murray Franklin
Joaquin Phoenix Arthur Fleck
Bradley Cooper Producer
Justin Theroux Ethan Chase (uncredited)
Zazie Beetz Sophie Dumond
Shea Whigham Detective Burke
Gregory Irwin First Assistant "A" Camera
Bill Camp Detective Garrity
Brett Cullen Thomas Wayne
Frances Conroy Penny Fleck
Thomas J. O'Connell ADR Mixer
Isabella Ferreira Flirting Woman on the Bus (uncredited)
John Cenatiempo Aftermath Police Officer, Stunts
Bob Kane Characters
Hannah Gross Young Penny
Brian Tyree Henry Carl (Arkham Clerk)
Todd Phillips Writer, Director, Producer
Kevin Michael Murphy Stunts
Glenn Fleshler Randall
Douglas Hodge Alfred Pennyworth
Bill Finger Characters
Marc Maron Gene Ufland
George Drakoulias Music Supervisor
April Grace Arkham Psychiatrist
Josh Pais Hoyt Vaughn
Shannon Nallan Set Decoration Buyer
Bryan Callen Haha's Stripper
Walter Hamada Executive Producer
Richard Burden Stunts
Keith Giffen Thanks
Frank Miller Thanks
Frank Wood Dr. Stoner
Kay Georgiou Hair Department Head
Sondra James Dr. Sally
Bruce Berman Executive Producer
Murphy Guyer Barry O'Donnell
Airon Armstrong Stunt Double
J. M. DeMatteis Thanks
Sharon Washington Social Worker
Chris Cenatiempo Stunts
Leigh Gill Gary
Scott Silver Writer
Chris Redd Comedy Club Emcee
Greer Barnes Haha's Clown
Mick Szal Woman on Subway
Adrienne Acevedo Lovette Middle Aged Woman (uncredited)
Jeff McCarthy NCB Anchor
Brendan Patrick Connor Mr. Slotnick (uncredited)
Lawrence Sher Director of Photography, Cinematography
Peter Epstein Stunts
Jill Brown Stunts
Dan O'Connell Foley Artist
Ray Iannicelli Haha's Clown
G.A. Aguilar Stunt Coordinator
Blaise Corrigan Taxi Driver (uncredited)
Stephen Izzi Stunts
Hildur Guðnadóttir Original Music Composer
Jason Cloth Co-Executive Producer
David Gibson WBC News Anchor
Carolina Jiménez Layout
Randall Poster Music Supervisor
Christian Wenger Sound Effects Editor
Gary Gulman Comedian
John T. Cucci Foley Artist
Laura Ballinger Supervising Art Director
Mark Friedberg Production Design
Tony D. Head WGC Anchorman
Dante Pereira-Olson Bruce Wayne
Christy Guillermain Key Costumer
Jane Fergus IBN Anchorwoman
Jeff Groth Editor
Carl Lundstedt Wall Street Three