Warner Bros. officially announced the development of the Birds of Prey movie, focusing on Harley Quinn and other female superheroes from the DC universe.
Margot Robbie was confirmed to reprise her role as Harley Quinn from Suicide Squad and to star in the Birds of Prey movie.
Mary Elizabeth Winstead, Jurnee Smollett-Bell, and Ewan McGregor were cast in major roles for the movie.
Principal photography for Birds of Prey began in Los Angeles.
The first official trailer for Birds of Prey was released, giving audiences a first look at the film.
The world premiere of Birds of Prey (and the Fantabulous Emancipation of One Harley Quinn) took place.
Harley Quinn ends her turbulent relationship with the Joker, setting the stage for her new independent life.
Joker leaves Harley on Valentine's Day, leaving her stranded and emotionally vulnerable.
Following the breakup, Harley fights police officers and causes chaos in Gotham City streets.
Cass Cain attempts to apprehend Harley Quinn, leading to a confrontation in the city.
Harley intervenes to rescue Cassandra Cain from Black Mask's enforcers, beginning their alliance.
Roman Sionis, aka Black Mask, is introduced as a powerful crime lord hunting for a stolen diamond.
Harley Quinn teams up with Huntress, Black Canary, and Renee Montoya to protect Cassandra and take down Black Mask.
Harley and the team face off against Black Mask's thugs in an intense fight at a local bar.
Post-battle, Harley fully embraces her independence and new identity separate from the Joker.
