 After having pitched the idea of a Harley Quinn film featuring the Birds of Prey team to Warner Bros. in 2015, she spent three years developing the project under her production company.The film, titled "Birds of Prey" and directed by Cathy Yan, was released in 2020 to critical praise.Leah Greenblatt of "Entertainment Weekly" commended Robbie for playing Quinn with a "giddy mix of mad-dog ruthlessness and girlish glee."