Margot Robbie
Harleen Quinzel / Harley Quinn
Idris Elba
Robert DuBois / Bloodsport
John Cena
Christopher Smith / Peacemaker
Sylvester Stallone
Nanaue / King Shark (voix)
Jai Courtney
George 'Digger' Harkness / Captain Boomerang
Peter Capaldi
Clifford DeVoe / The Thinker
David Dastmalchian
Abner Krill / Polka-Dot Man
Pete Davidson
Richard Hertz / Blackguard
Taika Waititi
Otis Flannegan / Ratcatcher
Steve Agee
John Economos / On-Set King Shark
Pom Klementieff
Dancer in Bar (non-crédité)