Titanic became the first film to gross over $1 billion worldwide.

Titanic is a 1997 American epic romantic disaster film written and directed by James Cameron. Incorporating both historical and fictionalized aspects, it is based on accounts of the sinking of RMS Titanic in 1912. The film stars Leonardo DiCaprio and Kate Winslet as members of different social classes who fall in love during the ship's maiden voyage. The film also features an ensemble cast of Billy Zane, Kathy Bates, Frances Fisher, Bernard Hill, Jonathan Hyde, Danny Nucci, David Warner, and Bill Paxton.

Films generate income from several revenue streams, including theatrical exhibition, home video, television broadcast rights, and merchandising. However, theatrical box-office earnings are the primary metric for trade publications in assessing the success of a film, mostly because of the availability of the data compared to sales figures for home video and broadcast rights, but also because of historical practice. Included on the list are charts of the top box-office earners, a chart of high-grossing films by calendar year, a timeline showing the transition of the highest-grossing film record, and a chart of the highest-grossing film franchises and series. All charts are ranked by international theatrical box-office performance where possible, excluding income derived from home video, broadcasting rights, and merchandise.