Noah Ringer as Aang

Dev Patel as Prince Zuko

Nicola Peltz Beckham as Katara

Jackson Rathbone as Sokka

Shaun Toub as Uncle Iroh

Aasif Mandvi as Commander Zhao

Cliff Curtis as Fire Lord Ozai

Seychelle Gabriel as Princess Yue

Katharine Houghton as Katara's Grandma

Francis Guinan as Master Pakku

Damon Gupton as Monk Gyatso

Summer Bishil as Azula

Randall Duk Kim as Old Man in Temple

Jessica Jade Andres as Suki

John D'Alonzo as Zhao's Assistant

Keong Sim as Earthbending Father

Isaac Jin Solstein as Earthbending Boy

Edmund Ikeda as Old Man of Kyoshi Town

John Noble as The Dragon Spirit (voice)

Morgan Spector as Lead Fire Nation Soldier

Karim Sioud as Fire Nation Prison Guard

Manu Narayan as Fire Nation Head Prison Guard

Kevin Yamada as Earth Kingdom Prisoner

Ted Oyama as Kyoshi Villager

Ritesh Rajan as Fire Nation Soldier

George DeNoto as Teahouse Child

Manuel Ishkhanian as Nervous Prison Guard

Roberto Lombardi as Fire Nation Soldier

Chris Brewster as Kicking Firebender

Ryan Shams as Lead Archer

Jeffrey Zubernis as Water Tribe Soldier

Brian D. Johnson as Water Tribe Soldier

J.W. Cortes as Fire Lord Attendant

M. Night Shyamalan as Firebender at Earth Prison Camp (uncredited)

Ben Cooke as Avatar Roku (uncredited)

Jeffrey Mowery as Northern Water Tribe Villager (uncredited)

Kristian Francis Falkenstein as Fire Nation Soldier (uncredited)