Principal performers included Alessandra Ambrósio, Beady Eye, BNegão, Russell Brand, Darcey Bussell, Naomi Campbell, Lily Cole, Taio Cruz, Ray Davies, Lily Donaldson, Jourdon Dunn, Elbow, Karen Elson, Fatboy Slim, David Gandy, Eric Idle, Georgia May Jagger, Jessie J, Richard Jones, Seu Jorge, Kaiser Chiefs, Annie Lennox, Julian Lloyd Webber, Madness, Nick Mason, George Michael, Marisa Monte, Kate Moss, Muse, One Direction, Pet Shop Boys, Queen, Mike Rutherford, Emeli Sandé, Ed Sheeran, Renato Sorriso, Timothy Spall, The Spice Girls, Take That, Tinie Tempah, Stella Tennant and The Who.
The volunteer cast of more than 3,500 came from all over the world (every continent is represented).
They gave up their evenings and weekends to take part in a total of 135 rehearsals at two east London sites. On average, adult volunteers rehearsed for 60 hours each.
The 380 child volunteers were drawn from 10 schools in the six east London Host Boroughs.