The Avett Brothers is made up of Seth Avett and Scott Avett, brothers who play the guitar and banjo with Bob Crawford playing the stand-up bass. Joe Kwon plays the cello on most of their tours.
The brothers were in a rock band called Nemo when Scott Avett began playing acoustic music with some friends at night. Seth Avett soon joined in and they called themselves The Back Porch Project or Nemo Downstairs. They began writing new songs and released The Avett Bros. album in 2000. Nemo broke up and the brothers continued with their own music. In 2002, they released the album Country Was and went on tour.
More albums followed and in 2007 they made their national television debut on Late Night with Conan O'Brien.
September 2009 saw the release of their album, I and Love and You. Rolling Stone magazine named them "The Artist to Watch of 2009" and it's easy to see why.
You can learn more about The Avett Brothers on their official website and purchase their music here.