The 26-year-old singer said her bond with Liam Hemsworth got stronger after they lost their home in the Woolsey Fire in November 2018.
“When you experience what we experienced together with someone, it is like glue. You’re the only two people in the world who can understand,” she told Vanity Fair.
The two donated $500,000 to The Malibu Foundation to help those affected by the fires rebuild through Cyrus' Happy Hippie Foundation in November.
In a personal memo for the magazine, Cyrus described the impact of the loss of her home and reflected on how it changed their relationship, saying the two "found a new bond underneath all that rubble."
She also notes that she didn't lose any loved ones in the fire.
"Going through a natural disaster, the grief you experience is really unlike any other loss. No more, just different," she wrote. "In our position it feels or looks like everything is replaceable and you can start again, but you can't buy spirit."
"Our place wasn't filled with expensive, meaningless s---, but art -- a lot of which I made on my own, and by others, including personal letters and drawings from Heath Ledger, John Kricfalusi, Joan Jett, Murakami, David LaChapelle, and so many others that I respect including our lovely photographer Ryan McGinley," she added.
She also shared how the fire, which took place one month before she married Hemsworth in a December ceremony, influenced their relationship.
"I'm not sure without losing Malibu, we would've been ready to take this step or ever even gotten married, who can say?" she wrote. "But the timing felt right and I go with my heart."
We’re redefining, to be f------ frank, what it looks like for someone that’s a queer person like myself to be in a hetero relationship.
Since getting married, Cyrus says life between the two isn't that different.
"I would say that losing the house changed us much more than getting married changed us," she told the outlet. "We've worn rings forever, and I definitely didn't need it in any way. It actually is kind of out of character for me."
Cyrus also spoke about her queer identity and why the two decided to make their union official.
"The reason that people get married sometimes can be old-fashioned, but I think the reason we got married isn't old-fashioned -- I actually think it's kind of New Age," she told Vanity Fair. "We're redefining, to be f------ frank, what it looks like for someone that's a queer person like myself to be in a hetero relationship."
"A big part of my pride and my identity is being a queer person. What I preach is: People fall in love with people, not gender, not looks, not whatever. What I'm in love with exists on almost a spiritual level. It has nothing to do with sexuality."
In her memo, she described more details of her wedding day and addressed stereotypes with which she feels she doesn't align.
"I wore a dress on my wedding day because I felt like it, I straightened my hair because I felt like it, but that doesn't make me become some instantly 'polite hetero lady.' (PS: Straight women are badass, too,)" she wrote.
Cyrus also called her relationship her "home." "I feel less misplaced when we are in the same room, no matter where that is, but just because something changes in my relationship doesn't mean something has to drastically change in my individuality," she wrote.
You know, I said I would move away if he became president. We all said a bunch of s--- we didn’t mean.
Cyrus, who is currently working on new music, also touched on being a woman in the entertainment industry. "Where men can be praised, women are frowned upon. I've experienced that first-hand," she wrote.
"The panic it causes for me to perform wearing a men’s Gucci suit, unzipped, baring my chest, versus coming out of my hotel greeting fans in a skirt with long, highlighted, blown-out hair," she continued. "The 'gold stars' I receive for being 'pretty' and for following the rules are really discouraging and uninspiring, but that also fuels me."
"It inspires me to continue to challenge boundaries; and be myself, even if some days I know exactly who that is more than other days," she added.
Cyrus also shared her controversial opinions on President Donald Trump with Vanity Fair. "You know, I said I would move away if he became president. We all said a bunch of s--- we didn't mean," she told the publication.
"Because we really thought: Maybe people will listen. Maybe people actually realize how detrimental this will be to our f------ country if this happens. Obviously they didn't," she continued.
"But for me to move away -- what the f--- is that going to change? As someone who is so proud of being an activist, am I going to feel proud of myself just running away from, and leaving everyone else here to live under, a completely racist, sexist, hateful a-----?" she said. "You can't leave everyone else to fend for themselves."