Kate Winslet has revealed the “door” in the much-debated ‘Titanic’ finale wasn’t a door.

The 49-year-old actress played Rose Dewitt Bukater alongside Leonardo Dicaprio, also 49, as Jack Dawson in filmmaker James Cameron’s 1997 film about the doomed Titanic liner, with the film controversially ending with Kate’s character surviving as she sits on what appeared to be a floating door while Jack clings to the side before freezing to death to apparently avoid adding his weight to the wood and causing it to sink with the ship.

Kate has now told her interviewer on Australian talk show The Project when asked if there was “room on the door” that would have saved her lover Jack’s life: “I thought, ‘He's busting out the Titanic question and next he's gonna ask me about the door.’

“I absolutely knew it. But, you know, what I will say that’s really interesting is people keep referring to it as a door. It actually wasn’t even a door.

“It’s a piece of bannister, like stairway or something, that had broken off.

“Who knows if (Jack) could’ve (fitted) on there or not.

“Honestly, I don’t have any insights here that anyone else hasn’t already tried to figure out.”

Armies of ‘Titanic’ fans are still outraged Rose didn’t let Jack share space on the “door”, and still run online forums discussing the scene.

‘Titanic’ director James Cameron, 70, is said to have commissioned a scientific study to determine if there was enough room for both Jack and Rose, with the director and a team of scientists apparently using two stunt doubles to reenact four different scenarios.

He said last year: “Jack might’ve lived, but there’s a lot of variables. I think his thought process was, ‘I’m not gonna do one thing that jeopardizes her’.”

Kate said during a 92nd Street Y question and answer session to promote her new war photographer drama ‘Lee’ her ‘Titanic’ co-star Leonardo has probably developed “PTSD” from being asked so many times about the door scene.