Britain's Prince William (CL), Duke of C

Britain's Prince William (CL), Duke of Cambridge, and Catherine, Duchess of Cambridge (CR), walk down the red carpet with an umbrella as they attend the UK premiere of US director Steven Spielberg's "War Horse" in Leicester Square central London on January 8, 2012. Michael Morpurgo's book was turned into a hugely successful international theatrical hit before being made into a film. Starring British actor Jeremy Irvine, the film tells the story of the First World War through the journey of a horse and it's owner. AFP PHOTO / POOL / IAN GAVAN (Photo credit should read Ian Gavan/AFP via Getty Images)