Uncle Earl is an American old-time music group, formed in 2000 by KC Groves and Jo Serrapere. Currently the lineup consists of four women, all of whom share vocal duties: KC Groves, Kristin Andreassen, Abigail Washburn, and Rayna Gellert. They have released three albums and two EPs, and their fifth album Waterloo, Tennessee was produced by John Paul Jones of Led Zeppelin.