William Bradley DuVall is an American musician. He has been the co-lead vocalist and rhythm guitarist of the rock band Alice in Chains since 2006, sharing vocal duties with Jerry Cantrell. DuVall joined Alice in Chains after original lead singer Layne Staley's death and has recorded three albums with the band: 2009's Black Gives Way to Blue, 2013's The Devil Put Dinosaurs Here, and 2018's Rainier Fog. He won an ASCAP Pop Music Award for co-writing the song "I Know" for Dionne Farris in 1996, and has earned three Grammy Award nominations as a member of Alice in Chains.