Alfie Williams as Spike

Jack O'Connell as Jimmy Crystal

Aaron Taylor-Johnson as Jamie

Ralph Fiennes as Dr. Ian Kelson

Cillian Murphy as Jim

Emma Laird as Jimmima

Maura Bird as Jimmy Jones

Erin Kellyman as Jimmy Ink

Ghazi Al Ruffai as Jimmy Snake

Sam Locke as Jimmy Fox

Robert Rhodes as Jimmy Jimmy

Connor Newall as Jimmy Shite