Borgarfjörður Eystri in Eastern Iceland had not been a filming location for any other productions earlier.
The cast for the youth roles took part in a 8-month acting training prior the filming.
The only reference to the characters' ages in the film is during the playground scene when Beta says "We're not 12 anymore". Writer/Director Guðmundur Arnar Guðmundsson has stated in interviews that Þór and Kristján are 13.