Three Weird Sisters has a unique sound, with a stunning blend of vocal harmonies and instruments. Their musical style ranges from Renaissance through to folk, blues, blue grass, and world music. Starting in Atlanta, Georgia, the original three Three Weird Sisters included Teresa Powell on bass, Brenda Sutton on guitar, bodhran, and various percussion instruments, and Gwen Knighton on harp. Gwen married and moved to the UK in 2005, which left an empty place in the group filled by pianist Mary Crowell.