The Legend of Aang: The Last Airbender is an American animated fantasy film directed by Lauren Montgomery and co-directed by William Mata. It serves as a continuation of the Nickelodeon animated television series Avatar: The Last Airbender (2005–2008), as well as the first production of Avatar Studios. The film stars the voices of Dave Bautista, Eric Nam, Dionne Quan, Jessica Matten, Román Zaragoza, and Steven Yeun, and will follow the series' main cast in their young adult years.

The film was announced in February 2021, along with the formation of Avatar Studios, a new division of Nickelodeon dedicated to the creation of projects set in the universe of the Avatar: The Last Airbender franchise. By June 2022, Montgomery was attached as director. Principal cast were announced in the following years, with the main voice roles from the series being mostly recast in respect to character ethnic and racial backgrounds. Animation studios that have been attached to provide animation for the production include Flying Bark Productions and Studio Mir.

The Legend of Aang: The Last Airbender is scheduled to be released theatrically in the United States on October 9, 2026, by Paramount Pictures.