Chaos Walking is a 2021 American dystopian science-fiction action-thriller film directed by Doug Liman and written by Patrick Ness and Christopher Ford. It is based on Ness's science fiction trilogy Chaos Walking, adapting its first book, 2008's The Knife of Never Letting Go. It stars Tom Holland, Daisy Ridley, Mads Mikkelsen, Demián Bichir, Cynthia Erivo, Nick Jonas and David Oyelowo. It follows a young man who lives in a dystopian world without women, where all living creatures can hear each other's thoughts in streams of images, words and sounds, called "Noise". When a woman crash-lands on the planet, he protects her from danger.

Announced in 2011, the film underwent several rewrites based on an initial draft by Charlie Kaufman, with Jamie Linden, John Lee Hancock, Gary Spinelli, Lindsey Beer, Ford and Ness revising it further. Liman was later announced as director in 2016, and principal photography began in 2017. Originally set to release on March 1, 2019, it was removed from the schedule to accommodate the film's reshoots in April 2019 after poor test screenings.

The film premiered in South Korea on February 24, 2021, and in the United States on March 5, 2021. It received generally negative reviews from critics who derided the lack of character development and overall execution. The film was also labeled a commercial failure, grossing $27.1 million worldwide against a $100‒125 million budget, resulting in a write-down for Lionsgate.