Bookmakers' favourites Alt-J, Lianne La Havas and Richard Hawley have also arrived at the Roundhouse in London, alongside DJs Nick Grimshaw and Lauren Laverne.
In pictures - Mercury Prize 2012 attendees:
Copyright: PA Images Yui Mok/PA Wire
Alt-J are heavily tipped to take home the annual prize for their LP An Awesome Wave, which was won by PJ Harvey last year.However, Digital Spy readers have voted for Plan B's iLL Manors soundtrack to win the award.
