Mira Furlan's final role was Babette; the actress passed away in January 2021.
Ella Purnell and Hailee Steinfeld never met during the production of the series, and when they finally met at the gala, they recalled that they had actually met years earlier at a photo shoot for Teen Vogue. The pair, who played Jinx and Vi throughout the first season, recorded all their lines in different countries due to their busy schedules and pandemic restrictions.
Jason Spisak, who voiced Silco, said he created the character's eerily calm voice not from the idea of a typical shouting villain, but from the idea of a 'tired father' who has seen too much.
While preparing for the role of Viktor, Harry Lloyd researched the history of the Industrial Revolution and the physical effects of 19th-century 'debilitating diseases' to realistically reflect the character's desperate ambition.