James Cameron has confirmed there will be three sequels to his 2009 ground-breaking movie, Avatar.

Cameron is so passionate about the trilogy of sequels that he has abandoned all other movie projects so that he can concentrate on the follow-ups.

The Titanic director has already began shooting deep sea footage for the second avatar film, which will be set underwater, and has come up with a wealth of content for the third and fourth instalment.

Cameron said: "Building upon the world we created with Avatar has been a rare and incredibly rewarding experience. In writing the new films, I've come to realise that Avatar's world, story and characters have become even richer than I anticipated, and it became apparent that two films would not be enough to capture everything I wanted to put on screen."

20th Century Fox chairman Jim Gianopoulos added: "We at the studio have no higher priority, and can feel no greater joy, than enabling Jim to continue and expand his vision of the world of Avatar. The growing breadth and scale of Jim Cameron's plans for his magnificent fantasy worlds continue to amaze us all."

The three films will be shot simultaneously, and will hit cinemas in 2016, 2017 and 2018.

In 2009, Avatar became the highest-grossing film in Hollywood history with takings of $2.7 billion worldwide.