Joaquin Phoenix

(Arthur Fleck)

Lady Gaga

(Lee Quinzel)

Brendan Gleeson

(Jackie Sullivan)

Catherine Keener

(Maryanne Stewart)

Zazie Beetz

(Sophie Dumond)

Steve Coogan

(Paddy Myers)

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

(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)

Stephen Stanton

(Stan L. Brooks)

Martin Kildare

(News Anchor)

Laurie Dawn

(Reporter)

Ashley Levinson

(Back-up Singer)