Los Angeles, Aug. 26 (PTI): Actor Kate Winslet said that she and her old friend Leonardo DiCaprio still quote lines from the Titanic to each other, even 20 years after the movie's release.

The 40-year-old actress said the two co-stars often shared "stupid things" with each other, which would be hard for people to believe, reports E! online.

"You don't even want to know the last conversation we had, because it was so funny and made me laugh so much. We found ourselves saying to each other, 'Can you imagine if the world really knew the stupid things we say?'

"I'm not going to tell you what we actually talk about, but yeah, we're very, very close and sometimes we do quote the odd Titanic line back and forth to each other, because only we can, and we find it really funny," Winslet told Glamour magazine.

Besides Titanic, they have also featured in the 2008 film Revolutionary Road.

Her interview comes days after photographs emerged of the pair getting cosy beside a swimming pool in the south of France earlier this summer - reigniting speculation of a romance, a rumour which they have consistently shot down.