Amazon Prime Video’s ‘Swarm’ features a slew of celebrity cameos, including Rory Culkin and Paris Jackson. But episode four’s celebrity guest star — the Grammy-winning Billie Eilish — has delivered one of the series’ buzziest appearances. Eilish’s character was inspired by that cult and it’s leader Keith Raniere, who was sentenced to 120 years in prison and fined $1,750,000 in the high-profile sex-trafficking case.