The studios originally wanted Matthew McConaughey to play Jack...
On the final night of shooting, someone put PCP (yes, the drug) into the clam chowder served to the cast and crew. 80 people were hospitalized and had hallucinations.
Titanic was the first film to be released on video while it was still being shown in theaters.
James Cameron was actually the one who drew all of the sketches in Jack's sketchbook. When they close up of Leonardo DiCaprio's hand in the infamous Rose sketching scene - it's actually Cameron's.
Gwyneth Paltrow was up for the role of Rose.
In early production, the film was originally called "Planet Ice" as a decoy.
