Video: The Duke and Duchess of Cambridge attend the premiere of African Cats William and Kate were dazzled by dozen of camera flashes when they arrived for the screening of the nature documentary raising funds for the Duke's UK-based animal conservation charity Tusk Trust. The royal couple, who celebrate their first wedding anniversary on Sunday, stepped from their chauffeur-driven car and walked the short distance to the BFI Southbank in London as banks of photographers shouted for their attention. The Duchess of Cambridge was wearing a Matthew Williamson grey dress, with three-quarter-length sleeves and coloured, beaded detail around the neck and sleeves, while William looked smart in a dark suit. Mark Knopfler, lead singer of the group Dire Straits, was among the guests along with filmmaker Guy Ritchie and Dragons' Den judge Deborah Meaden, a patron of Tusk Trust. William and Kate also met children and young adults from charities that have the Duke and Duchess as patrons. The wildlife film tells the story of life on Kenya's plains for a pride of lions and a family of cheetahs as they battle for survival. Hollywood star Patrick Stewart narrates the true-life story of cheetah Sita bringing up her five cubs in the Masai Mara game reserve and of Mara, a six month-old lion cub being raised by her mother Layla.