Often, like Dr Zhivago and Romeo And Juliet, the greatest screen romances are those beset by difficulty. Here we celebrate celluloid love affairs made all the sweeter for being transient or thwarted by circumstance. Among them is 2009 multiple Oscar-winner Slumdog Millionaire which sees slum kid Jamal Malik (Dev Patel) meet, lose, refind, then again lose love Latika (Freida Pinto) on the tough streets of Mumbai. He ultimately has to appear on the Indian version of Who Wants To Be A Millionnaire? to try to find her again.