Johnny Depp is rumoured to be starring in a new movie about poisoned ex-KGB spy ALEXANDER LITVINENKO, after Warner Bros bought the film rights to a book on his murder. Depp's production company Infinitum Nihil is to make the movie for Warner Bros, sparking rumours Depp himself will take the lead role. British police are still investigating the death of Litvinenko last year (06) after traces of lethal polonium-210 radiation were found in his body when he was admitted to London's University College hospital three weeks before he died.