Isobel Campbell is the former cellist and backup vocalist for Belle & Sebastian, as well as leader of The Gentle Waves. Mark Lanegan used to be the frontman of the Seattle grunge band The Screaming Trees, has recently played with Queens of the Stone Age, and formed together with Greg Dulli The Gutter Twins. Lanegan has also been releasing solo albums since 1990. Together, Campbell and Lanegan form a unique combination of gruff vocals and dulcet voices.