Bringing 1997’sTitanicto life was a massive undertaking.

(Titanicused to be number one untilAvatarsurpassed it in 2010.)

(He’s been there 33 times, in fact.)

Footage of the Titanic wreckage use in the film

Footage of the Titanic wreckage used in the film.20th Century Fox

“I thought ‘My God… that’s incredible.

They’re using this space technology to go into the past like a time machine.’

And something clicked right then,“Cameron toldEmpirein 1998.

Kate Winslet and Leonardo DiCaprio in ‘Titanic’

Kate Winslet and Leonardo DiCaprio in ‘Titanic’.20th Century Fox

Thus, the idea forTitanicwas born.

“I wasn’t scared,” Cameron toldEmpireof his reaction to seeing the ship for the first time.

“I’m not claustrophobic and I love diving.

The ‘Titanic’ sinks on set

The ‘Titanic’ sinks on set.20th Century Fox

For me, it was like landing on the moon.”

One weirdtruestory is the tale of thePCP-laced chowder.

Someone even started a conga line.

TITANIC, 1997

20th Century Fox

Thankfully, 87-year-oldGloria Stuart, who played the older Rose, dined out at a restaurant that night.

The final product is seamless, which is very impressive considering the lighting, close-ups, and general chaos.

At one point, Winslet told the press thatshe had almost drownedwhen her coat caught on a gate.

The ‘Titanic’ cast spent long hours floating in giant tanks and pools

The ‘Titanic’ cast spent long hours floating in giant tanks and pools.20th Century Fox

“He really did look after me.

He was totally brilliant he wouldn’t leave my side.”