Top Cast
Joaquin Phoenix
Arthur Fleck
Lady Gaga
Lee Quinzel
Brendan Gleeson
Jackie
Catherine Keener
Maryanne Stewart
Zazie Beetz
Sophie Dumond
Steve Coogan
Paddy Meyers
Harry Lawtey
Harvey Dent
Leigh Gill
Gary Puddles
Ken Leung
Dr. Victor Liu
Jacob Lofland
Ricky Meline
Sharon Washington
Social Worker
Troy Fromin
E Ward Inmate (Troy Larkins)
Bill Smitrovich
Judge Herman Rothwax
John Lacy
Arkham Guard
Gattlin Griffith
Masked Joker Driver
Tim Dillon
Arkham Guard
Mike Houston
Guard
G.L. McQueary
Head Bailiff
Jimmy Smagula
Guard
Brian Donahue
Guard
Alfred Rubin Thompson
Ernie Bullock
Robert Loftus
Guard
Carson Higgins
Junior Associate
Ben van Diepen
Music Class Singer
Casey Burke
Joker Girl
Connor Storrie
Young Inmate
Gregg Daniel
Music Teacher
Mac Brandt
Arkham Guard
George Carroll
Arkham Guard
Wayne Dehart
E Ward Inmate
Ajgie Kirkland
E Ward Inmate
Terrance T.P. Polite
E Ward Inmate
Jimmy Walker Jr.
E Ward Inmate
Toney Wilson
E Ward Inmate
June Carryl
Dr. Louise Beatty
Don McManus
Paddy Myers' Producer
Angela D. Watson
Jury Foreman
Murphy Guyer
White Chapel Minister
Hudson Oz
Joker Doppelganger
Ray Lykins
Victim's Dad
Will Ropp
Joker Fan #1
Ashton Moio
Joker Fan #2
Emilio Rojas
Joker Fan #3
Joe Spinney
Police Escort
Richard Busser
Additional Guard