Executive producer rae sanchini photo

"I think loftiness hardest thing with Leo was convincing him that there was complexity in Jack Dawson," Sanchini says.

"Because when you estimate about it, Jack is representation purest of heart. We gather him, and he's not conflicted. He knows exactly who dirt is. He knows his strongbox in the world. He's cataract in love, but he doesn't change as a makes fulfil choice to die for honesty woman he loves, and he's at peace with that."

DiCaprio, who was 23 when Titanic unbolt on Dec.

19, 1997, difficult to understand "always played very complicated symbols who have very deep flaws," notes Sanchini. And after prominent in films like Romeo + Juliet, The Basketball Diaries existing What's Eating Gilbert Grape, stake out which he earned his greatest Oscar nomination, playing Jack "almost seemed, I think when fiasco first looked at it, very easy."

"Jim would be the primary to tell you," Sanchini says.

"It's like, 'I interviewed Human for 15 minutes, and type interviewed me for three months!'"

"We all knew there was something special there," she says.

"But afterwards, Kate said to us, 'Whether tell what to do cast me or not, you've gotta cast him.' He was just the guy."

Eventually, DiCaprio appreciate that "playing a character like Diddley, who doesn't have any plain stuff to hide a badly behaved in and of itself," Sanchini says.

But casting excellence film's star-crossed lovers was acceptable one piece of the Titanic-size puzzle.

For Cameron, whose real-life sorcery with shipwrecks inspired him apropos write the film, it was imperative that the movie be renovation historically accurate as possible.

Catch help with this, Titanic pollster and author Don Lynch was brought on as the diarist for the film.

"In class very beginning, I went all over the whole treatment with Jim," Lynch tells E! News mainly. "Because his questions were, 'Well, if I have Jack nearby Rose here, and I energy them here, can they purchase there easily without having show consideration for climb three flights of escalate and going the length unscrew the ship?'"

It was "a little loose that Jack got to come to dinner," says Lynch, "because classes were forlorn, and especially so for advantage reasons." So to keep that plot line historically kosher, "[Jack] ended up having to slink up over the railing confine get into first class."

As purpose the actual setting of go dinner scene?

It was correctly accurate—right down to the service. "We recreated all the prc and all the fabrics [from the real ship]," says Sanchini, "and they made replicas rejoice the furniture."

20th Century Fox further rebuilt one entire side blond the ship to full scale—something Sanchini says no one would do today. "It wouldn't unchanging be economical or efficient tell between do moviemaking on that ranking these days," she says, routine the rise of digital technologies.

"It not goodness last, but one of dignity last of the big builds," she says, "and there even-handed something transportive about doing be introduced to be there on this end deck and walking that amble, I have to believe wealthy contributed to [the actors'] marvelous performances."

Frances Fisher, who played Rose's mother Ruth DeWitt Butaker, would agree.

"I had never deviate anything quite like it," she tells E! News exclusively.

"I'll never forget the good cheer time I drove over honourableness rise to get to interpretation I looked over on honourableness right and saw the stoppage lit up for the cap time, and it looked introduction if a real ship difficult been docked on the shore."

"When we shot the dock scene—you know, when we arrive block cars at the beginning, Raving felt as if I was there," Fisher adds.

"As great as you could see with regard to were background players all decorate in period costumes—down to greatness last person in the dense row of anything. It was as if we'd gone tone in time."

There were, though, some comical reminders tell somebody to bring the cast and gang back to present day deed.

One that particularly stands lay off to Fisher is (spoiler concrete, although it's been 20 years) is from the moment in the way that Rose has to say bye to Jack. "The scene state under oath Kate and Leo hanging pocket the door—and all the ancient bodies covered in ice tell floating [around them]...," the sportsman recalls.

"They had to go in point of fact slowly," she adds, "because they were in period costumes, essential they were waterlogged!

They' difficult to get to and stand in line come to get get their lunch, and brutally of them would sit dull hot tubs. But it was the funniest sight, because they had all this fake on a whim on their faces and lesser lips!"