After her breakup with the Joker, Harley Quinn joins forces with singer Black Canary, assassin Huntress, and police detective Renee Montoya to help a young girl named Cassandra, who had a hit placed on her after she stole a rare diamond from crime lord Roman Sionis.
| Art | K.K. Barrett | Production Design |
| Production | K.K. Barrett | Production Designer |
| Camera | Matthew Libatique | Director of Photography |
| Editing | Jay Cassidy | Editor |
| Production | David Ayer | Executive Producer |
| Production | Walter Hamada | Executive Producer |
| Crew | Jonathan Eusebio | Stunt Coordinator |
| Production | Kelley Smith-Wait | Executive In Charge Of Production |
| Sound | Mark DeSimone | ADR Mixer |
| Sound | Paula Fairfield | Sound Designer |
| Production | Hans Ritter | Executive Producer |
| Production | Brittany Petros | Location Manager |
| Production | Geoff Johns | Executive Producer |
| Production | Margot Robbie | Producer |
| Camera | Claudette Barius | Still Photographer |
| Sound | Daniel Pemberton | Original Music Composer |
| Production | Rich Delia | Casting |
| Art | Kasra Farahani | Supervising Art Director |
| Sound | Luke Gibleon | Sound Effects Editor |
| Costume & Make-Up | Erin Benach | Costume Designer |
| Sound | Brandon Proctor | Sound Re-Recording Mixer |
| Sound | Craig Dollinger | Boom Operator |
| Sound | Michael W. Mitchell | Sound Effects Editor |
| Art | Rich Romig | Set Designer |
| Editing | Evan Schiff | Editor |
| Sound | Phil Barrie | Sound Effects Editor |
| Sound | Darren Maynard | Sound Effects Editor |
| Crew | Jon Valera | Fight Choreographer |
| Visual Effects | Annemarie Griggs | Visual Effects Producer |
| Writing | Christina Hodson | Screenplay |
| Sound | Katy Wood | Supervising Sound Editor |
| Art | Amy Lynn Umezu | Storyboard Artist |
| Sound | Steven Morrow | Sound Mixer |
| Visual Effects | Mark Hawker | Special Effects Supervisor |
| Production | Bryan Unkeless | Producer |
| Art | Julien Pougnier | Art Direction |
| Visual Effects | Kenneth Au | Visual Effects Supervisor |
| Directing | Cathy Yan | Director |
| Production | Sue Kroll | Producer |
| Costume & Make-Up | Julia Saeri Lee | Costume Assistant |
| Sound | Bryan Mendoza | Utility Sound |
| Crew | Chuck Dixon | Creator |
| Writing | Chuck Dixon | Comic Book |
| Production | Beatrice Cerezo | Key Art Production Assistant |
| Art | Molly Hunter Flick | Art Department Coordinator |
| Crew | Jordan B. Gorfinkel | Creator |
| Writing | Jordan B. Gorfinkel | Comic Book |
| Crew | Greg Land | Creator |
| Production | Galen Vaisman | Executive Producer |
| Visual Effects | Samira Khan | Visual Effects Coordinator |
