Joaquin Phoenix

Arthur Fleck

Robert De Niro

Murray Franklin

Zazie Beetz

Sophie Dumond

Frances Conroy

Penny Fleck

Brett Cullen

Thomas Wayne

Shea Whigham

Detective Burke

Bill Camp

Detective Garrity

Glenn Fleshler

Randall

Leigh Gill

Gary

Josh Pais

Hoyt Vaughn

Rocco Luna

GiGi Dumond

Marc Maron

Gene Ufland

Sondra James

Dr. Sally

Murphy Guyer

Barry O'Donnell

Douglas Hodge

Alfred Pennyworth

Dante Pereira-Olson

Bruce Wayne

Carrie Louise Putrello

Martha Wayne

Sharon Washington

Social Worker

Hannah Gross

Young Penny

Frank Wood

Dr. Stoner