The original name was Birds of Prey and the Fantabulous Emancipation of One Harley Quinn, but representatives from Warner Bros shortened it to Birds of Prey to make it easier for fans to find the movie.
Prior to this, Margo Robbie appeared as Harley Quinn in Suicide Squad, a film which had a record-breaking $133.6m ($103.6m) opening.
The DC film saw Margot Robbie’s Harley Quinn join fellow women of Gotham in a fight against the evil mob boss Black Mask (Ewan McGregor).
The Birds of Prey comic writer Gail Simone criticised the film’s depiction of the character of Cassandra Cain.