Kendall Jenner and Gigi Hadid are getting super candid about their big breaks in modeling.
The BFFs both star in the latest installment of W's "Screen Tests" with the fashion magazine's Editor at Large, Lynn Hirschberg, in which they talk about their upbringing, celebrity crushes, and more. The black-and-white videos get pretty intimate, with the two getting honest about plenty of personal topics.
Kendall, 20, recalls her big break -- her first Marc Jacobs runway show in February 2014 -- specifically, when she went braless.
WATCH: Kendall and Kylie Jenner Get Matching Ferraris -- See the 'Embarrassing' Pics
"I actually surprisingly was not nervous, not extremely nervous," she says. "I was more excited. I think I wasn't nervous because I was wearing flats. I was like, 'I can't fall. There's no way I can fall.'"
"And then my t*ts were out. I don't know why I wasn't nervous about that," she continues. "I was really excited about my t*ts being out, actually."
Clearly, Kendall -- who's also been known to flaunt her nipple piercing -- isn't too concerned with showing that particular part of her body.
"I'm weird. I love my t*ts being out," she says bluntly. "It's like one of my things, I guess. ... When I'm older, I want to be able to look at it and be, like, I looked good."
Meanwhile, 21-year-old Gigi actually got her first modeling gig for Guess when she was just two years old. Surprisingly, she acknowledges that criticism about her runway walk is valid.
"It's funny because, obviously, I'm not the best on the runway," she admits. "OK everyone, we did it, Gigi said it, I know it! But, what do you do? My first show people were already expecting a lot more from me than I [was capable of at the time]. I never was taught how to walk on the runway. And maybe that's because it moved really quickly for me, that people just assumed that that was something I knew."
"So, you know, a year and a half later, I'm still learning," she adds. "I got some compliments on my Tom Ford show, so I'm getting better. I'm working on it, but I'm human. I still get insecure on the runway, but it's really exciting for me because I want to get better. I love being on the runway."
One undeniable trait the models share is their admirable work ethic.
"I think I was raised to be a workaholic, so I think that I knew it was going to happen at some point," Kendall says. "I've been working since I was 10 years old."
"I was on a reality TV show, which you could consider a job," she explains, referring to E!'s Keeping Up With the Kardashians. "It's technically a job, but it's working with my family every single day, so I'm very lucky to call it a job. ... And then my little sister [Kylie Jenner] and I are baby bosses. We basically are on our way to rule the world, so you can expect that."
As for Gigi, she says her mother, former Real Housewives of Beverly Hills star Yolanda Hadid, gave her the best piece of career advice she's ever been given.
"I think my favorite thing that she says is, 'When you start working, you better be the most hardworking, nicest person in the room because if you're not, then there's always going to be someone prettier, nicer, and more hardworking,'" Gigi shares. "And that's just something that I always think about when I get to set. ... It's always a first impression, and I think that the thing I try and remember is that you have to give your energy for that time, because it's the time that counts, and that's how the person's going to remember you."
WATCH: Gigi Hadid Ditches Pants, Steps Out in Nude Bodysuit
Last month, Kendall explained on her official app why she loves to go braless, and even tweeted out a video montage of some of her latest braless looks.