"I was in the room next to them, listening to the 'Titanic' soundtrack trying to stay in sad, teary mode," Robbie recalled. "It was very surreal."

Margot Robbie has spilled the beans on her shocking secret about how she prepares for emotional scenes, and it involves her co-star, Leonardo DiCaprio.During a teaser for her upcoming appearance on the Talking Pictures: A Movie Memories Podcast,

Margot Robbie recalled using the ‘Titanic’ soundtrack to cry on set and both Leonardo DiCaprio and Kate Winslet witnessed it

The Barbie star is set to guest on the upcoming Nov. 26 episode of TCM and Max’s podcast Talking Pictures, according to Variety. During her chat with host Ben Mankiewicz, Robbie reveals her tried and true trick for conjuring up tears in a performance.

When it comes to the Hollywood heavyweights, actors use a range of methods to really embody their onscreen characters. Florence Pugh has spoken about the 'bleak' way she prepared for Midsommar, and Lady Gaga spent 9 months speaking with an Italian accent off set while filming House of Gucci.

How does Margot Robbie turn on the waterworks when preparing for a big scene? “I can even just hear the theme music of ‘Titanic,’ and I’ll be bawling,” Robbie said in an upcoming episode of the “Talking Pictures: A Movie Memories Podcast.