Developed by
- Justin Helpern
- Patrick Schumacker
- Dean Lorey
Directed by
- Vinton Heuck
Written by
- Adam Stein
Based on characters from
- DC
Executive producers
- Dean Lorey
- Justin Helpern
- Patrick Schumacker
- Kaley Cuoco
- Sam Register
Supervising producers
- Jennifer Coyle
- Adam Stein
Line producers
- Ciara Anderson
- Julian Coutts
Supervising director
- Cecilia Aranovich Hamilton
Co-producers
- Sabreena Jalees
- Laura Moran
- Sarah Peters
Casting direction by
- Robert McGee, C.S.A.
- Ruth Lambert, C.S.A.
Voice direction by
- Dean Lorey
- Patrick Schumacker
Additional voice direction by
- Charlie Adler
Starring the voices of
- Kaley Cuoco as Harley Quinn
- Jason Alexander as Sy Borgman
- Lake Bell as Poison Ivy
- Ron Funches as King Shark
- Tony Hale as Dr. Psycho
- Matt Oberg as Kite Man
- JB Smoove as Frank the Plant
- Alan Tudyk as Clayface
- Rahul Kohli as Scarecrow
- Jim Rash as The Riddler, Mr. Isley
- Rory Scovel as Gus
Harley Quinn created by
- Paul Dini
- Bruce Timm
King Shark created by
- Karl Kesel
Sy Borgman created by
- Jimmy Pamliotti
Music by
- Jefferson Friedman
Associate producer
- Jessica Brunson
Assistant production managers
- Cali D. Abenido
- Annushka Almendros
- Monica Banares
- Abby Jensen
- Brooke Kolisar
Art director
- William Wray
Lead character design
- Shane Glines
Character design
- Dusty Abell
- Bryce Collins
- TJ Collins
- Amanda Conner
- Alex Wilson
Prop design
- Andy Chiang
- Bob Dever
Color supervisors
- Ji Soo Kim
- Jesse Silver
Background key design
- Alexander Dilts
- Rodel Gravo
- Jason Park
- Jeff Purves
- Qianjiao Ma
- Ryan Magno
- Ceasar Martinez
Background paint
- Valerie Jung
- Susan Yung
Color designer
- Kim Bitsui
- Emily Setterfield
Storyboard
- Gary Hartle
- Jean Kang
- Joonki Park
- Adam van Wy
Storyboard revisions
- Francisco Barrios
- Sandra Frame
Editors
- Charles Breiner
- Annie De Brock
Timing director
- Michael Wolf
Animation timing
- Patrick Buchanan
- Phil Cummings
- Jamie Huang
- Tom Mozzacco
- Mitch Richon
- Swinton Scott
Animation checking
- Jan Browning
- Sarah Vidal
Animation director
- Mac Whiting
Animator
- Andrew Borno
Supervising technical director
- Matthew Giradi
Effects animation
- Gustavo Djuro
- Amanda Lamarco
Animation services provided by
- Digital Emation
Animation director
- Jinhyun Choi
Production support
- Ashley Hee-Eun Bae
- Sujin Jung
- Agatha Sarim Kim
- Scarlet Sookyung Kim
- Kyunmin Lee
Layout artists
- Dong-Hwan Oh
- Dongkyu Lee
- Minyung Kim
Key animation
- Jinwoo Jung
- Joochul Jung
- Hyosik Kim
- Byung-Ho Lee
- Sangtae Shin
- Jungman Yoon
Inbetween
- Chulki Hong
- Jinsook Jung
- Mijung Jeon
- Jin-Ha Kim
- Myung-Ho Kim
- Jinah Lee
Color stylists
- Eunyung Ahn
- Yong Ahn
- Jungbong Jang
- Minjung Kim
Composite
- Kang-Ok Kim
- Joohee Yang
CG
- Eddie Jaeil Byun
- Daeguen Hong
- Fatou Gassama
- Hongsun Yoon
BG painter
- Sunee Heo
Model checkers
- Hye-Young Jo
- Mijung Kim
- Sunyung Noh
Clean-up
- Yejoon Lee
Final checker
- Bong-Soo Eun
Post production executive
- Greg Emerson
Post production managers
- Brittany Canasi
- Rebecca Unger
Recording facilities
- Atlas Oceanic Sound & Picture
- Post Modern Sound (VC)
- Salami Studios, LLC
- Pomann Sound
- Warner Bros- Post Production Services
Recording machine operator
- Jeff O. Collins
Track Readers
- Wilson Martinez
- Fred Salinas
Supervising dialogue editor/ADR editor
- Mark A. Keatts
Dialogue editor/ADR editors
- Kelly Foley Downs
Post production sound services
- Atlas Oceanic Sound & Picture
Online editor
- Darren Griffiths
Assistant editors
- Harrison T. Barth
- Michele Beeson
- Gabriel Gianola
Production administrator
- Frances Chang
Production support
- Cher Bentley
- Jamiesen Borak
- Daphne Fei
- Kate Heckman
- Shelly Jacobs
- Brenna Kraus
- Tamara Miles
- Tracy Nicolleti
- Kira Trimacco
- Renee Toporzysek
Casting administration
- Liz Carroll
Production accounting
- Yadira Davis
- Debbie Lindquist
- Maral Simonian
- Athena Wingate
Rights and clearances
- Brendan Brasier
Business and legal affairs
- Jennifer Allen
- Lori Blackstone
- Leslie Chinchilla
- Shanon Muir
- Bonnie Negrete
Production supervision
- Bobbie Page
- Susan Ward
Production Management
- Ed Adams
Executive in charge of production
- Audrey Diehl
- Peter Girardi