Brendan Gleeson Jackie Sullivan
Zazie Beetz Sophie Dumond
Joaquin Phoenix Arthur Fleck
Catherine Keener Maryanne Stewart
Lady Gaga Lee Quinzel, Songs, Music Consultant
Mikel Parraga-Wills Foley Mixer
Steve Coogan Paddy Meyers
George B. Colucci Jr. Stunts
Jacob Lofland Ricky Meline
John T. Cucci Foley Artist
Stephanie Higgins Frey Art Department Coordinator
Bob Kane Characters
Emma Tillinger Koskoff Producer
Ken Leung Dr. Victor Liu
Mac Brandt Arkham Guard
Connor Storrie Young Inmate
G.L. McQueary Head Bailiff
Brendon O'Dell Special Effects Coordinator
Dan O'Connell Foley Artist
Todd Phillips Original Film Writer, Director, Producer, Writer
Sharon Washington Debra Kane
Bill Finger Characters
Lawrence Sher Director of Photography
Don McManus Paddy Meyers' Producer
Craig Baxley Jr. Stunts
Tim Rigby Stunts
Ben van Diepen Music Class (uncredited)
Nicki Ledermann Makeup Designer
John Lacy Arkham Guard
Bill Smitrovich Judge Herman Rothwax
Bruce Timm Characters
Doug Coleman Stunts
Ethan Van der Ryn Supervising Sound Editor, Sound Designer
Tim Trella Stunts
Stephen Stanton Stan L. Brooks (voice)
Eliza Coleman Stunts
Steven A. Morrow Sound Mixer
Scott Silver Executive Producer, Original Film Writer, Writer
Harry Lawtey Harvey Dent
Casey Burke Girl #1 (uncredited)
Gregg Daniel Music Teacher
Mark Friedberg Executive Producer, Production Design
Paul Dini Characters
Geoffrey Haley "C" Camera Operator
Gattlin Griffith Masked Joker Driver
Leigh Gill Gary Puddles
Francine Maisler Casting
Dean A. Zupancic Sound Re-Recording Mixer
Wayne Dalglish Stunts
Andy Gill Stunts
Richard Epper Utility Stunts
J.P. Jones Property Master
Randall Poster Music Supervisor
Russell Farmarco Dialogue Editor, ADR Editor
Jason Oliver ADR Mixer
Karen O'Hara Set Decoration
Michael Uslan Executive Producer
Matt Berberi Stunt Double
Jess King Additional Guard
Rafael E. Sánchez Gaffer
George Drakoulias Music Supervisor
Declan Mulvey Stunts
Erik Aadahl Supervising Sound Editor
Shauna Duggins Stunts
Will Ropp Joker Fan #1
James M. Halty Stunts
Brian Simpson Stunts
Chris Barnes Stunts
Mallory Thompson Stunts
Colin Anderson "A" Camera Operator, Steadicam Operator
Ashton Moio Joker Fan #2
Jerry Robinson Characters