LOS ANGELES — Jon Landau, an Oscar-winning producer who worked closely with director James Cameron on “Titanic” and the “Avatar” series, has died. He was 63.

Alan Bergman, Disney Entertainment co-chairman, announced Landau’s death in a statement Saturday. No cause of death was given.

“Jon was a visionary whose extraordinary talent and passion brought some of the most unforgettable stories to life on the big screen. 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,” Bergman said.

Landau’s partnership with Cameron led to three Oscar nominations and a best picture win for 1997’s “Titanic.” Together the pair account for some of the biggest blockbusters in movie history, including “Avatar” and its sequel, “Avatar: The Way of Water.”

Landau’s career began in the 1980s as a production manager, and he gradually rose through the ranks until taking on a producer role on “Titanic,” Cameron’s expensive epic about the infamous disaster. The bet paid off: “Titanic” became the first movie to cross $1 billion in global box-office earnings and went on to win 11 Oscars, including best picture.

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

Their partnership continued, with Landau becoming a top executive at Cameron’s Lightstorm Entertainment. In 2009 the pair watched as “Avatar,” a sci-fi epic filmed and shown in theaters with groundbreaking 3D technology, surpassed the box-office success of “Titanic.” It remains the top-grossing film of all time.

Its sequel, “Avatar: The Way of Water,” is third on the list.

Landau has been a key player in the “Avatar” franchise, which saw frequent delays of the release of “The Way of Water.” Landau defended the sequel’s progress and Cameron’s ambitious plans to film multiple sequels at once to keep the franchise going.

“A lot has changed but a lot hasn’t,” Landau told The Associated Press in 2022, a few months ahead of the sequel’s release. “One of the things that has not changed is: Why do people turn to entertainment today? Just like they did when the first ‘Avatar’ was released, they do it to escape, to escape the world in which we live.”

Landau was named an executive vice president of feature movies at 20th Century Fox when he was 29, which led him to oversee major hits including “Home Alone” and its sequel, as well as “Mrs. Doubtfire” and “True Lies,” where he first started working closely with Cameron.