But Jacob wasn't the only one that Cailee bonded with during filming, as she got to spend a lot of time with Priscilla herself.

"She was so generous to go through this time in her life again because she's done it so many times," Cailee shared. "But she also just said, 'If you need me for anything beyond this movie and filming, I just want you to know that I'm here to talk anytime.' I just thought that it was really kind. She didn't have to say that or do that, but she did. And I think that speaks a lot of who she is as a person."

In fact, after seeing the Sofia Coppola film for the first time in Venice, Cailee noted that Priscilla complimented on her on "a great performance."

"She just said, 'I watched my life through you,'" the Devs actress shared. "That's sort of all I need to hear. I think we did it, done. I made this movie for her. I wanted her to feel seen and sort of safe and so to hear those words is everything."

Priscilla debuts in theaters nationwide on Nov. 3.

—Reporting by Nikaline McCarley