The announcement of Eilish's casting created a lot of excitement among fans, and her performance helped make the episode one of the most popular of the series, which was created by Janine Nabers and Donald Glover.
In an interview with The Hollywood Reporter, Nabers revealed that Eilish's character was based on the notorious cult NXIVM and its leader, Keith Raniere, who was recently sentenced to 120 years in prison for sex trafficking.
Nabers explained that the episode was meant to explore the idea of celebrity and the power of the mind, rather than focusing on the cult of a particular artist or group.
In 'Swarm', Eilish plays Eva, the leader of a women's empowerment cult who takes Dre, a young woman fixated on a pop star, under her wing. The show follows Dre (played by Dominique Fishback) as her obsession with the pop star takes a dark turn.
'Swarm' premiered on March 17, 2023, exclusively on Amazon Prime Video.