Avatar is Cameron's first full-length feature since 1997's Titanic
Sci-fi spectacular Avatar continues to dominate UK and US cinemas, and has now become the most successful film ever at the international box office.
The epic film remains top of the charts on both sides of the Atlantic, with overall takings of $1.83bn (£1.141bn).
Its continued success puts in course to overtake Titanic's worldwide box-office tally of $1.84bn (£1.143bn).
In North America, the James Cameron film has replaced The Dark Knight as the second-biggest release of all time.
However, this has only been achieved due to the higher ticket prices cinemagoers have paid to see it in 3D.
Challenger
In the UK and Ireland, Avatar remains top of the box office chart for a sixth straight week.
Its weekend takings of £5.1m - which have swelled its overall haul to £57.4m - put it well ahead of its nearest challenger, Guy Ritchie film Sherlock Holmes.
Paul Bettany plays an angel fighting to save mankind in Legion
In the US and Canada, Avatar's takings now stand at $551.7m (£342.5m).
And, based on earnings outside the US and Canada, Avatar is now the biggest international release of all time.
Its takings, excluding North America, now amount to $1.287bn (£799m) - putting it $45m (£27.9m) ahead of Titanic.
As in the UK, Avatar remains unchallenged in the US and Canada after six straight weeks at number one.
Its nearest rival was Legion, an apocalyptic thriller starring Paul Bettany that opened in second place with a first weekend haul of $17.5m (£10.8m).
The 3D science fiction epic romance ''Avatar'' has surpassed ''Titanic''—also by director James Cameron—as the highest-grossing international film of all time.

''Avatar'' has overtaken ''Titanic'' by a margin of more than 15 million US dollars, with both films grossing in excess of $1.843bn. The film has been the most popular film in box offices around North America and Europe for six weeks, with United Kingdom takings for this weekend alone in excess of £5.1m. In the United States, the film has pushed ''The Dark Knight'' into third place.

''Avatar'''s victory has been put down to the higher prices many viewers have had to pay to see the film in 3D, as well as inflation over time (as the figures have not been adjusted for such). If the figures are adjusted for inflation, it is beaten to the top spot by ''Gone with the Wind''. In the adjusted chart, ''Titanic'' makes it only to number six, with other members of the top ten including ''Star Wars'', ''The Sound of Music'', and ''E.T: The Extra-Terrestrial''.