Spoilers ahead for Birds of Prey.
Birds of Prey (And the Fantabulous Emancipation of One Harley Quinn) has been in theaters for a few weeks now, helping to further expand the DC Extended Universe in the process. In addition to bringing back Margot Robbie’s Harley Quinn for her second outing on the big screen, Cathy Yan’s blockbuster also introduced some comic book favorites to the DCEU for the first time. These characters include Huntress, Black Canary, and Cassandra Cain. The latter was played by young actress Ella Jay Basco, and it turns out that she really became a pickpocket for the blockbuster.
Article source: https://www.cinemablend.com/news/2491005/how-birds-of-preys-cassandra-cain-became-a-real-pickpocket-for-the-dc-movie