Lucy Walker (born 1970; London) is an British documentary film director. She has directed the feature documentaries Devil's Playground (2002), Blindsight (2006), Waste Land (2010), Countdown to Zero (2010), The Crash Reel (2013), Buena Vista Social Club: Adios (2017), Bring Your Own Brigade (2021), and Mountain Queen: The Summits of Lhakpa Sherpa (2023). She has also directed the short films The Tsunami and the Cherry Blossom (2011) and The Lion's Mouth Opens (2014). Waste Land was nominated for the Academy Award for Best Documentary Feature and The Tsunami and the Cherry Blossom was nominated for the Academy Award for Best Documentary (Short Subject).