How do you think you’ve paid tribute to those who have endured domestic violence?

RD: I have been a spokesperson for different campaigns, campaigns for violence against women. My mom, when she was younger, worked at an organization called Woman Inc., which was my first real experience. To know my mom was on the other side of that war for a woman like my character when she's finally ready to get out of this, that she needs help, was always so powerful to me.

The sex scene was a game changer on many levels. Was that because you had a female director, you think?

RD: This bathroom scene, Julia’s throwing him up against the wall. It's coming from her desperation. Normally, it's about the sex and not the subtext. I thought that was really important to have a woman at the helm. We were able to get into a lot of details without saying a word.

Warner Bros.

Playing the villain is tough. She is psychotic, but you don’t want to be cartoonish. How did you strike that balance?

KH: I felt sorry for her. Her crazy is born out of insecurity. She is terrified of not being perfect. If she isn't, her whole world will fall apart. The desperation to hold on to it is what drives her to make choices that any sane person wouldn't make. There's a reason for each one of these choices. She's not getting the results she wants. So she goes one step further. All of it was coming from a place of sincerity. It wasn't just to be outrageous and just to be crazy.

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