Jacob Elordi has an "obsession" with his Wuthering Heights co-star Margot Robbie

Jacob told Fandango: "We have a mutual obsession.

"I think the thing is, regardless of plot or screenplay, if you have the opportunity to share a film set with Margot Robbie, you're going to make sure you're within five to 10 metres at all times.

"Watching how she drinks tea, how she eats her food, how she does it. When is it going to slip? When is the thing going to come undone? And, it never comes undone."

Jacob and Margot play star-crossed lovers Heathcliff and Catherine in the film and the Euphoria actor felt that the pair were totally immersed in the story.

He recalled: "There'd be a moment where we'd be running hand-in-hand through the moors - maybe not even in the scene, just setting it up - where I'd look across at her and she'd be looking at me... and in that moment, we really were a part of their love, for real."

The Wuthering Heights trailer has hinted at some racy scenes between the two stars and Margot, 35, explained that she was left feeling "weak at the knees" by some elements of the movie.

The Barbie actress told British Vogue: "It almost made me feel weak at the knees. It was the little things that we loved as two women in our 30s, and this movie is primarily for people in our demographic. These epic romances and period pieces aren't often made by women."

However, Margot stressed that viewers will be "surprised" by the picture's content when it is released next month.

She said: "Everyone's expecting this to be very, very raunchy. I think people will be surprised...

"Not to say there aren't sexual elements and that it's not provocative - it definitely is provocative - but it's more romantic than provocative. This is a big epic romance."

Margot also believes that Wuthering Heights will fill a gap in the romantic movie genre.

The A Big Bold Beautiful Journey star said: "It's just been so long since we've had one - maybe The Notebook, also The English Patient. You have to go back decades...

"It's that feeling when your chest swells or it's like someone's punched you in the guts and the air leaves your body. That's a signature of Emerald's. Whether it's titillating or repulsion, her superpower is eliciting a physical response."