It is a debate that has raged since Titanic became one of the most successful films of all time, as to whether 'Rose' leave 'Jack' to die by not letting him up on the makeshift lifeboat.
And a US television show has carried out a series of tests that show DiCaprio's character could have survived the disaster had he lifted himself onto the raft from which Rose, played by Winslet, was plucked.
A Discovery Channel show recreated the treacherous conditions after the Titanic sank in 1912 and, through hypothermia tests, discovered Jack would have survived the freezing conditions if he had climbed out, the Daily Mail reported.
As fans of the 1997 blockbuster will remember, Jack remains in the freezing water while Rose lies on top of a floating piece of the wreckage as he does not want to topple it.
In the dramatic climax to the Oscar-winning epic, Jack dies from hypothermia while Rose is rescued.
Titanic director James Cameron said in the show that he believed the wooden life raft would not have supported both Jack and Rose.
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But the team found that if Rose had taken off her lifejacket and put it under the raft it would have given them enough buoyancy to keep both of them afloat.
Hosts Adam Savage and Jamie Hyneman then carried out a hypothermia test to see what would happen if Di Caprio's character had indeed climbed out of the water and onto the wooden door.
A dummy with gelatin flesh and a water-heated copper cardiovascular system that was rigged to monitor body temperature was used to simulate Di Caprio's character.
The dummy's body temp was set at 98.6 degrees and dressed in wet clothes. It was then set hovering above the freezing water in 29 degrees Fahrenheit air as if he were lying on the wooden raft.
The show found that as long as he was rescued before his body temperature dropped below 82 degrees Fahrenheit, he could be revived.
After an hour on the raft they found the dummy's core body temp was 82.5 degrees Fahrenheit, meaning Jack would have lived had he got out of the water.
Cameron, however, had the last word telling the TV show that Jack had to die as that's what the script called for.