Brendan Gleeson Jackie Sullivan
Joaquin Phoenix Arthur Fleck
Zazie Beetz Sophie Dumond
Lady Gaga Lee Quinzel, Songs, Music Consultant
Steve Coogan Paddy Meyers
Catherine Keener Maryanne Stewart
Ken Leung Dr. Victor Liu
Connor Storrie Young Inmate
Jacob Lofland Ricky Meline
Bill Smitrovich Judge Herman Rothwax
Bob Kane Characters
Todd Phillips Original Film Writer, Director, Producer, Writer
Don McManus Paddy Meyers' Producer
Bruce Timm Characters
Gattlin Griffith Masked Joker Driver
Francine Maisler Casting
Matt Berberi Stunt Double
Casey Burke Girl #1 (uncredited)
Bill Finger Characters
Mac Brandt Arkham Guard
Pete Chiappetta Executive Producer
Sharon Washington Debra Kane
Paul Dini Characters
Dan O'Connell Foley Artist
Ethan Van der Ryn Supervising Sound Editor, Sound Designer
Will Ropp Joker Fan #1
Tim Rigby Stunts
Harry Lawtey Harvey Dent
George Drakoulias Music Supervisor
George Carroll Arkham Guard
Erik Aadahl Supervising Sound Editor
Stephen Stanton Stan L. Brooks (voice)
John T. Cucci Foley Artist
Leigh Gill Gary Puddles
Shauna Duggins Stunts
Murphy Guyer White Chapel Minister
Mallory Thompson Stunts
Brian Machleit Stunt Coordinator
David Webb First Assistant Director
Scott Silver Executive Producer, Original Film Writer, Writer
Jerry Robinson Characters
Anthony Tittanegro Executive Producer
Tim Trella Stunts
Eliza Coleman Stunts
Doug Coleman Stunts
Randall Poster Music Supervisor
Nicki Ledermann Makeup Designer
Ashton Moio Joker Fan #2
Emma Tillinger Koskoff Producer
Sylvain Chomet Animation
Ajgie Kirkland E Ward Inmate
June Carryl Dr. Louise Beatty
Andrew Lary Executive Producer
Brian Donahue Additional Guard
Mike Houston Additional Guard
John Lacy Arkham Guard
Andy Gill Stunts
Gregg Daniel Music Teacher
Chris Barnes Stunts
Hildur Guðnadóttir Original Music Composer
Wayne Dalglish Stunts
Richard Epper Utility Stunts
Declan Mulvey Stunts
James M. Halty Stunts
Jeff Groth Editor
Jake Swallow Stunts
Geoffrey Haley "C" Camera Operator
Gregory Irwin First Assistant "A" Camera
Colin Anderson "A" Camera Operator, Steadicam Operator
Jill Bogdanowicz Other
Lawrence Sher Director of Photography
Ryan Robert Howard Second Assistant Director