Returning to mark Amnesty International's 50th anniversary, The Secret Policeman's Ball 2012 is bigger than ever as some of the world's best comedians and musicians team up for an evening of original, cutting-edge entertainment. This year's Secret Policeman's Ball takes place in March at New York City's Radio City Music Hall, featuring an all-star cast of music and comedy talent. Among the line-up of British and American talent are Coldplay, Russell Brand, Jon Stewart, Stephen Colbert, Mumford & Sons and Reggie Watts. UK and US stars featuring in the celebration of free speech and Amnesty International's 50th anniversary include Noel Fielding - who will be reunited on stage with Russell Brand - Sarah Silverman, Jimmy Carr, Statler and Waldorf from The Muppets, Micky Flanagan, Jack Whitehall, Jason Sudeikis, David Walliams, Seth Meyers and Kristen Wiig. Established in 1976, The Secret Policeman's Ball uses anarchic humour to throw a spotlight on human rights abuses and celebrates the right to free speech through comedy and music.