The cast of "Avatar: The Last Airbender" features both fresh and familiar faces. Gordon Cormier will play Aang, Kiawentiio Tarbell will play Katara, Ian Ousley will play Sokka, and Dallas Liu will play Zuko. Additional cast members include Paul Sun-Hyung Lee as Uncle Iroh, Lim Kay Siu as Gyatso, Ken Leung as Commander Zhao, Elizabeth Yu as Azula, Yvonne Chapman as Avatar Kyoshi, Tamlyn Tomita as Yukari, Casey Camp-Horinek as Gran Gran, and Maria Zhang as Suki.
Unlike the 2010 film adaptation, which was panned for whitewashing characters, the creators of the Netflix adaptation prioritised casting actors of Asian and Indigenous backgrounds to stay true to the original story.