They’ve been together nine years, but instead of calling each other on the phone during their most recent period apart, Angelina Jolie and Brad Pitt wrote each other love letters.

The actress recently revealed the duo decided to try the old-fashioned form of communication when they were filming on different continents, inspired by the fact they were both working on World War II-themed projects.

“He was supportive from a distance and it was quite romantic in a way,” the 39-year-old said of her time directing the biopic Unbroken in Australia while Brad shot the film Fury in London.

angelina jolie

Angelina filming her latest project, “Unbroken,” in Australia

“We decided to be of that time, when we could imagine he was in the European theater and I was in the Pacific theater, and we wrote handwritten letters to each other that were very connecting for us, 
thinking of the people that were separated for months, if not years, at a time back then,” the mother-of-six shared with Australia’s TV Week.

Angie also opened up about getting to show a cut of her biopic to the real-life subject — Olympian turned war hero, Louis Zamperini — before his death on July 2 from pneumonia.

“I brought him the film on my laptop in the hospital and it was amazing seeing someone at the end of their life watching their life unfold again, at the same time their body was shutting down,” the Oscar winner explained.

Related: Angelina Jolie Not Retiring “Completely” From Acting, But Doing “Much Less”

“He wanted me to make the movie to show something hopeful about the strength of the human spirit that can pull us through. He reminded me to have my surgery [a double mastectomy] in the year that I did, and he reminded me to appreciate every day of my life.”

Next up for Brad and Angelina is the highly-anticipated film, By The Sea, which will be the couple’s first on-screen reunion since their meeting on the set of Mr. & Mrs. Smith. In addition to co-starring alongside her fiancé, the Maleficent star will also write and direct the flick.