Jon Landau, an Oscar-winning producer who collaborated with the director James Cameron in making three of the highest-grossing films of all time, “Titanic” and the two “Avatar” movies, died on July 5 in Los Angeles. He was 63.

Mr. Landau and Mr. Cameron’s decades-long collaboration made box office history. The first film they made together, “Titanic,” became the first movie to gross more than $1 billion globally after its 1997 release. Its record for total earnings, $1.84 billion, was broken by their next film, the science-fiction epic “Avatar” (2009).

“Titanic” was nominated for 14 Oscars and won 11, including best picture.