Athletes take a starring role at the Olympic Games, but with 100 days to go until London 2012, we take a look at who else makes up the cast of thousands behind the sporting event of the year.

Source: Locog. Music: Andrew White (PRS) Music Candy

Design: Salim Qurashi. Production: Dominic Bailey, Michael Hirst, Christine Jeavans

London 2012 from the BBC