 | Margot Robbie | .... | Harley Quinn |
 | Rosie Perez | .... | Renee Montoya |
 | Mary Elizabeth Winstead | .... | Helena Bertinelli |
 | Mary Elizabeth Winstead | .... | The Huntress |
 | Jurnee Smollett-Bell | .... | Dinah Lance |
 | Jurnee Smollett-Bell | .... | Black Canary |
 | Ewan McGregor | .... | Roman Sionis |
 | Ella Jay Basco | .... | Cassandra Cain |
 | Chris Messina | .... | Victor Zsasz |
 | Ali Wong | .... | Ellen Yee |
 | David Ury | .... | Sleazy Breeder |
 | Sara Montez | .... | Shallow Friend #1 |
 | Sara Montez | .... | Kathrine |
 | Isabel Pakzad | .... | Shallow Friend #2 |
 | Daniel Bernhardt | .... | Sionis' Chauffeur |
 | KC Strubbe | .... | Naïve Teammate |
 | Jacky Shu | .... | Skeptical Teammate |
 | Paloma Rabinov | .... | Bitchy Teammate |
 | Derek Wilson | .... | Detective Tim Monroe |
 | Guiseppe Bucaro | .... | Carlo Rossi |
 | James Henry Williams Jr. | .... | Ace Chemical Police Officer |
 | François Chau | .... | Mr. Keo |
 | Miyuki Matsunaga | .... | Mrs. Keo |
 | Anna Mikami | .... | Miss Keo (16 yrs) |
 | Bruno Oliver | .... | Bodega Cook (Sal) |
 | Keisha Tucker | .... | Roller Derby Girl |
 | Matthew Willig | .... | Happy |
 | Jeremy Denzlinger | .... | Desk Sergeant |
 | Michael Masini | .... | Officer Drago |
 | Charles Carpenter | .... | Processing Officer |
 | Daniel Cole | .... | Patrol Cop |
 | Jesse Bush | .... | Patrol Cop |
 | Steven Williams | .... | Captain Patrick Erickson |
 | Charlene Amoia | .... | Maria Bertinelli |
 | Paul Lasa | .... | Helena's Father |
 | Ella Mika | .... | Young Helena |
 | Robert Catrini | .... | Stefano Galante |
 | Eddie Alfano | .... | Helena's Bodyguard |
 | Chris Carnel | .... | Desk Sergeant |
 | Buddy Sosthand | .... | Coffee Cup Cop |
 | Tim Sitarz | .... | Donut Cop |
 | Shawn Balentine | .... | Key Card Cop |
 | Shahaub Roudbari | .... | Smarmy Guy |
 | Pramode Kumar | .... | Irate Shopkeeper |
 | Christine Engh | .... | Elderly Woman |
 | KK Barrett | .... | Dr. Aguilar |
 | David Bianchi | .... | Sionis Henchman #1 |
 | Simon Rhee | .... | Cell Guard |
 | Terrence Julien | .... | Cell Guard |
 | George Crayton | .... | Prisoner |
 | Caleb Spillyards | .... | Prisoner |
 | Qiang Li | .... | Prisoner |
 | Anthony Nanakornpanom | .... | Prisoner |
 | Sala Baker | .... | Prisoner |
 | Christian Womack | .... | Prisoner |
 | Bryan Sloyer | .... | Prisoner |
 | Kofi Yiadom | .... | Mercenary |
 | Efka Kvaraciejus | .... | Mercenary |
 | Sam Hargrave | .... | Mercenary |
 | Dennis Kieffer | .... | Mercenary |
 | Dana Lee | .... | Doc |
 | Bojana Novakovic | .... | Erika |
 | Andy Hoff | .... | Erika's Date |
 | Eric Michael Cole | .... | Disgruntled Man |
 | Oakley Lehman | .... | Mercedes Gang |
 | Richard King | .... | Mercedes Gang |
 | Tim Rigby | .... | RR Passenger |
 | César Alejandro | .... | Market Shopper with Hat (uncredited) |
 | David Anthony Buglione | .... | Joe Bertinelli (uncredited) |
 | John Carlo Castro | .... | The Joker (uncredited) |
 | Jason Catron | .... | Sprang Bridge Soldier (uncredited) |
 | Dan Cole | .... | Officer Timm (uncredited) |
 | Stephen Corliss | .... | Courtesy Clerk (uncredited) |
 | Joey Courteau | .... | Club Dancer (uncredited) |
 | Phil DiGennaro | .... | Hunter (uncredited) |
 | Sadyr Diouf | .... | Roman's Goon (uncredited) |
 | Jack Dourakos | .... | Club Goer (uncredited) |
 | Gerald Downey | .... | Judge (uncredited) |
 | Michael Edelstein | .... | Pawnbroker (uncredited) |
 | Mike Ferguson | .... | Lord of the Avenue (uncredited) |
 | Eddie J. Fernandez | .... | Gauntlet Cop (uncredited) |
 | Julian Garcia | .... | Roman's Goon (uncredited) |
 | Shad Gaspard | .... | Lords Leader (uncredited) |
 | Luis Richard Gomez | .... | Harley Super Fan (uncredited) |
 | Nico Greetham | .... | Young Goon (uncredited) |
 | William Guirola | .... | Thug (uncredited) |
 | John Hennigan | .... | Lords Gang Member (uncredited) |
 | Damon Hoffman | .... | Bodybuilder (uncredited) |
 | Brandon Irvin | .... | Roman's Goon (uncredited) |
 | Jesse James | .... | Lords of The Avenue Gang (uncredited) |
 | Judy Kain | .... | Bespectacled Secretary (uncredited) |
 | Leo Lam | .... | Dancer (uncredited) |
 | Arlondriah Lenyéa | .... | Featured Dancing Club Kid (uncredited) |
 | Jeff Lipary | .... | BBB Gang Member (uncredited) |
 | Di Medio Lucas | .... | Roman's bodyguard (uncredited) |
 | Lenora May | .... | Mrs. Marcucci (uncredited) |
 | Lawrence Mclendon | .... | Goon (uncredited) |
 | Ego Mikitas | .... | Don (uncredited) |
 | Cavin Mohrhardt | .... | Roman's Goon (uncredited) |
 | Anthony Molinari | .... | Mafiosi (uncredited) |
 | Brandon Garic Notch | .... | Roman's lift Goon (uncredited) |
 | Adinett Nsabimana | .... | Girl at the bar (uncredited) |
 | Brian Nuesi | .... | Husband (uncredited) |
 | Matthew Parry-Jones | .... | Club Goer (uncredited) |
 | Nick Phillips | .... | Roller Derby Fan (uncredited) |
 | Diezel Ramos | .... | Gotham Detective (uncredited) |
 | Talon Reid | .... | Roman's Goon (uncredited) |
 | Zeus Sagittarius | .... | Roman's Goon (uncredited) |
 | Greice Santo | .... | Scantily Clad Crystal (uncredited) |
 | Nev Smith | .... | Gotham Detective (uncredited) |
 | Dustin Stern-Garcia | .... | Rob Gregorian (uncredited) |
 | Karen Teliha | .... | Nun (uncredited) |
 | Ellay Watson | .... | Roller Derby Fan (uncredited) |
 | Ryan Watson | .... | Prisoner #1 (uncredited) |
 | Rj Wayne | .... | Tough Guy (uncredited) |
 | Zack Whyel | .... | Roman's Healer (uncredited) |