Blake Mills is an American songwriter, guitarist, producer, and composer based in California. He is known for production and guitar work on albums and singles by many artists, including Fiona Apple, Perfume Genius, Bob Dylan, Feist, Jack Johnson, Marcus Mumford, Laura Marling, Weyes Blood, John Legend, Alabama Shakes, Beck, The Killers, Conor Oberst, and Bruce Hornsby; as a touring musician with artists such as Lucinda Williams, Band of Horses and Jenny Lewis; and his four solo albums.

Wylie Gelber is a professional bassist and guitar maker from Los Angeles, California. A founding member of the band Dawes, Gelber played bass in the band from 2009 to 2023. Gelber played on Dawes' first eight albums.