The Last Airbender is a 2010 American action adventure fantasy film written, co-produced, and directed by M. Night Shyamalan. Based on the first season of the Nickelodeon animated television series Avatar: The Last Airbender (2005–08), the film stars Noah Ringer, Dev Patel, Nicola Peltz, Jackson Rathbone, Shaun Toub, Aasif Mandvi, and Cliff Curtis. The plot follows Aang, a young Avatar who must master all four elements of air, water, fire, and earth and restore balance to the world while stopping the Fire Nation from conquering the Water Tribes and the Earth Kingdom.

Development for the film began in January 2007, and the casting and pre-production process happened in 2008. Principal photography began in March 2009 and ended on September, with a preliminary schedule held in Greenland for two weeks, and the rest of the film being shot in major locations across Pennsylvania, United States. Post-production began in August and took several months due to extensive visual effects. The name Avatar was dropped from the title to avoid confusion with James Cameron's 2009 film Avatar.

The Last Airbender premiered at the Alice Tully Hall in New York City on June 30, 2010, and was theatrically released in the United States the following day by Paramount Pictures. The film was panned by critics, audiences, and fans of the original series upon its release, and is widely considered to be one of the worst films ever made. Many criticized the screenplay, acting, direction, casting, dialogue, action sequences, plot holes, unfaithfulness to the source material, characters, and 3D conversion. The Last Airbender opened in second place at the box office behind The Twilight Saga: Eclipse. Produced on a $150 million budget, the film grossed $131 million domestically and $319 million worldwide. It is the fourth-highest-grossing film produced by Nickelodeon Movies, behind The SpongeBob Movie: Sponge Out of Water (2015), Teenage Mutant Ninja Turtles (2014), and The Adventures of Tintin (2011). The film was originally envisioned as a trilogy of films each based on the three seasons of the series, but due to the universal backlash and the low profits of the first film, the planned trilogy was ultimately scrapped.

A live-action television series was released in 2024.