During the auditions, Kaya Scodelario, who was 14 at that time, claimed to be 16 on the forms to get herself noticed. She later felt that she was too young for the part and was about to leave. But a producer told her to stay and convinced her to read for the part of Effy.
One character from all of the three generation dies. Generation 1 Chris dies from Subarachnoid Hemorrhage, Generation 2 Freddie is beaten to death by Effy's psychotic counselor, and Generation 3 Grace dies from her coma after being in a car crash.