Margot Robbie Plans Hiatus From 'Exhausting' Role as Harley Quinn Movie The 'Suicide Squad' actress is taking a breather from her DC comic book superhero character after the upcoming release of the James Gunn-directed adaptation. Jul 14, 2021 The star has taken on the role of The Joker's sidekick in three DC Extended Universe (DCEU) movies in the past five years, including 2020's "Birds of Prey" and the upcoming " Margot told Entertainment Weekly, "It was kind of back-to-back filming Birds... and filming this (The Suicide Squad), so I was kind of like, 'Oof, I need a break from Harley because she's exhausting.' "