Joaquin Phoenix (Arthur Fleck / Joker), Zazie Beetz (Sophie Dumondová), Robert De Niro (Murray Franklin), Douglas Hodge (Alfred Pennyworth), Brett Cullen (Thomas Wayne), Frances Conroy (Penny Flecková), Shea Whigham (detektiv Burke), Marc Maron (Ted Marco), Bill Camp (detektiv Garrity), Josh Pais (Hoyt Vaughn), Kadrolsha Ona Carole (stávkující s klaunskou maskou), Cate Jolie, Bryan Callen, Glenn Fleshler, Sharon Washington, Ben Warheit, Dante Pereira-Olson (mladý Bruce Wayne), Leigh Gill (Gary), Lauren Yaffe (Pogo), David Iacono, Brian Tyree Henry, Lynn Farrell (žena na gala), Winslow Bright (mladá žena ve Wayne Tower), Chris Redd |