Oscar-winning producer of Titanic and Avatar Jon Landau dies ...

Director James Cameron has led tributes to producer Jon Landau who has died. He was 63.

Landau worked with Cameron on some of the biggest blockbusters of all time – Titanic, Avatar and the Avatar sequel The Way of Water.

His family who announced his passing hasn't given a cause of death.

Oscar-winning producer Jon Landau has died.

He was 63.

Landau worked closely with director James Cameron on the 1997 blockbuster Titanic, about the infamous 1912 maritime disaster.

Titanic was the first movie to gross $US1 billion ($1.5 billion) in global box-office earnings and won 11 Oscars, including best picture.

"I can't act and I can't compose and I can't do visual effects, so I guess that's why I'm producing," Landau said while accepting the award with Cameron.

The two also worked together on the 2009 film Avatar and its 2022 sequel Avatar: The Way of Water.

A third Avatar film is in post-production.

Jon Landau (left) and James Cameron (right) won Oscars for Best Picture for Titanic at the 70th annual Academy Awards in 1998. (AP Photo/Reed Saxon, File)

Cameron led the tributes to his friend and closest collaborator of 31 years.

"A part of myself has been torn away," Cameron said in a statement.

"His zany humour, personal magnetism, great generosity of spirit and fierce will have held the centre of our Avatar universe for almost two decades.

"His legacy is not just the films he produced, but the personal example he set — indomitable, caring, inclusive, tireless, insightful and utterly unique."

Landau started out as a production manager in the 1980s, working his way up to co-producer on the 1989 film Honey, I Shrunk the Kids and 1990's Dick Tracy.

Landau became a top executive at Cameron's Lightstorm Entertainment and in 2009 their sci-fi epic Avatar surpassed the box-office success of Titanic, becoming the top-grossing film of all time.

Source: Box Office Mojo

One of the stars of the Avatar franchise Zoe Saldaña posted an emotional tribute on Instagram, saying he'll be deeply missed.

Disney Entertainment co-chairman Alan Bergman also paid tribute.

"Jon was a visionary whose extraordinary talent and passion brought some of the most unforgettable stories to life on the big screen," he said in a statement.

"His remarkable contributions to the film industry have left an indelible mark, and he will be profoundly missed.

"He was an iconic and successful producer yet an even better person and a true force of nature who inspired all around him."

Born in New York on July 23, 1960, Landau was the son of the late film producers Ely and Edie Landau.

Jon Landau is survived by his wife of nearly 40 years, Julie; their sons, Jamie and Jodie; and two sisters and a brother.

ABC/AP