Avatar: The Last Airbender is an American adventure fantasy television series developed by Albert Kim for Netflix. It is a live-action adaptation of the animated television series created by Michael Dante DiMartino and Bryan Konietzko for Nickelodeon. The series stars an ensemble cast including Gordon Cormier, Kiawentiio, Ian Ousley, Dallas Liu, Paul Sun-Hyung Lee, Ken Leung, and Daniel Dae Kim.

The series is set in a fictional world where human civilization is divided into four nations based on the four classical elements: the Water Tribes, the Earth Kingdom, the Fire Nation, and the Air Nomads. In each nation, some people known as "benders" can telekinetically manipulate one of the four elements. The story follows the journey of twelve-year-old Avatar Aang, the last survivor of the Air Nomads and the next "Avatar" who can master all four elements, awoken after a century of being frozen in ice. The series was first announced in September 2018, with DiMartino and Konietzko attached as both executive producers and showrunners. However, in June 2020, the pair departed the series over creative differences. In August 2021, Kim was officially announced as a writer, executive producer and showrunner.

The first season was released on Netflix on February 22, 2024, and garnered mixed reception from critics. In March 2024, the series was renewed for a second and third season.