Harley Quinn joins forces with a singer, an assassin and a police detective to help a young girl who had a hit placed on her after she stole a rare diamond from a crime lord.
Margot Robbie
as Harley Quinn
Rosie Perez
as Renee Montoya
Mary Elizabeth Winstead
as Helena Bertinelli / Huntress
Jurnee Smollett
as Dinah Lance / Black Canary
Ewan McGregor
as Roman Sionis
Ella Jay Basco
as Cassandra Cain
Chris Messina
as Victor Zsasz
Ali Wong
as Ellen Yee
David Ury
as Sleazy Breeder
Sara Montez
as Shallow Friend #1 / Kathrine
Izabel Pakzad
as Shallow Friend #2
Daniel Bernhardt
as Sionis' Chauffeur
