alt-J's have won the 2012 British Mercury Prize for their debut album "An Awesome Wave" , which was released in May 2012 in Europe and September 2012 in the United States.
Joe Newman (2007-) Guitar, Vocals
Gus Unger-Hamilton (2007-) Keyboards
Thom Green (2007-) Drums
Gwilym Sainsbury (2007-2014) Guitar, Bass