Joaquin Phoenix
Arthur Fleck
Lady Gaga
Lee Quinzel
Brendan Gleeson
Jackie Sullivan
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
Bill Smitrovich
Judge Herman Rothwax
Sharon Washington
Debra Kane
Alfred Rubin Thompson
Ernie Bullock
Connor Storrie
Young Inmate
Gregg Daniel
Music Teacher
Mac Brandt
Arkham Guard
George Carroll
Arkham Guard
John Lacy
Arkham Guard
Tim Dillon
Arkham Guard
Wayne Dehart
E Ward Inmate
Troy Fromin
E Ward Inmate
Ajgie Kirkland
E Ward Inmate
Jimmy Walker Jr.
E Ward Inmate
Toney Wilson
E Ward Inmate
June Carryl
Dr. Louise Beatty
Don McManus
Paddy Meyers' Producer
G.L. McQueary
Head Bailiff
Angela D. Watson
Jury Foreman
Murphy Guyer
White Chapel Minister
Carson Higgins
Junior Associate
Gattlin Griffith
Masked Joker Driver
Hudson Oz
Joker Doppelganger
Ray Lykins
Victim's Dad
Will Ropp
Joker Fan #1
Ashton Moio
Joker Fan #2
Brian Donahue
Additional Guard
Mike Houston
Additional Guard
Jess King
Additional Guard
Jimmy Smagula
Additional Guard
Stephen Stanton
Stan L. Brooks (voice)
Martin Kildare
News Anchor
Laurie Dawn
Reporter
Dominiqué Williams-Blair
Reporter
Barry Bonder
Reporter
Kaylah Sharve' Baker
Back-up Singer
Ashley Levin
Back-up Singer
Celeste Butler
Back-up Singer
Casey Burke
Singer (uncredited)
