A hard-hitting new movie based on Nelson Mandela's autobiography, Long Walk to Freedom, has been chosen for this year's (13) Royal Film Performance in Britain. The acclaimed film, starring Idris Elba as Mandela, premiered at the Toronto International Film Festival in Canada last month (Sep13), and now it will be screened for members of the British royal family in December (13). Justin Chadwick's biopic also features actress Naomie Harris as Mandela's second wife Winnie.