Jeremy Irons as Mi (voice)

Alicia Vikander as Huppu (voice)

Jim Broadbent as Horozovich (voice)

Khalid Abdalla as Bat (voice)

Sheridan Smith as Gavra (voice)

Kevin Bishop as Hassan (voice)

Christopher Villiers as Craven (voice)

Ella Smith as Tifa (voice)

Michele Austin as Jula (voice)

Khalid Abdalla as Bat / Wise Bird 3 (voice)

Mark Spencer as Bird Police (voice)

Jay Villiers as Wise Bird 1 (voice)

Dan Stevens as Wise Bird 2 (voice)

Oliver Villiers as Mean Chick (voice)

Janine Wetherall as Other Chicks (voice)

Noah Harthstone-Kolovich as Other Chicks (voice)

Lola Harthstone-Kolovich as Other Chicks (voice)

Eli Harthstone-Kolovich as Other Chicks (voice)

Antonia Roupell as Hens (voice)

Harriet Barrow as Hens (voice)

Catriona Paterson as Hens (voice)