"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."

The 2013 movie – in which the 34-year-old actor starred opposite Jack Dawson actor Leonardo DiCaprio -featured plenty of raunchy, volatile, and emotional scenes between the onscreen husband and wife. Since the movie demanded Margot’s character, Naomi Lapaglia, start crying during one scene the Barbie star did what any rational person would do.

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.

Margot Robbie likes to use the Titanic soundtrack for inspiration, but she never imagined both Leonardo DiCaprio and Kate Winslet would witness it. "I can even just hear the theme music of Titanic, and I'll be bawling,