 "Titanic" became the highest-grossing film in history nine weeks after opening on 19 December 1997, and a week later became the first film ever to gross $1 billion worldwide.By March 1998 it had made over $1.2 billion, a record that stood until Cameron's next drama film "Avatar" overtook it in 2009.Cameron's film centres around a love affair between First Class passenger Rose DeWitt Bukater (Kate Winslet) and Third Class passenger Jack Dawson (Leonardo DiCaprio).