Abigail Washburn is an American clawhammer banjo player and singer. She performs and records as a soloist, as well as with the old-time bands Uncle Earl and Sparrow Quartet, experimental group The Wu Force, and as a duo with her husband Béla Fleck.

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.