Metz recently sat down with ET's Kevin Frazier, where she opened up about her breakthrough role in This is Us,
and how it came after years of being told she wouldn't be able to reach success given her weight.
"For a long time it was like, 'Oh, you're too heavy. I don't know if you can make it in this business,’ or, 'You know what? You're too pretty to play the big girl.' I don't even know what that means," Metz recounted.
According to the 36-year-old actress
, many producers, executives and casting directors in Hollywood believe that "plus-size women can't be attractive because nobody wants to be intimate or love a plus-size woman or a plus-size guy."
Getting the chance to prove that misconception wrong on network TV with her dynamic role, Metz explained, is "bringing up so many conversations that nobody had before."
However, the negative perception directed toward plus-size women extends beyond the boundaries of Hollywood boardrooms.
"Plus-size women or plus-size people have always been the butt of the joke," Metz said. "Because there are men… I know men personally who don't want to publicly date plus-size women but they’re like, secretly in love with them."
Metz said she also knows a lot of women who struggle to meet men who aren't paralyzed by negative social stigmas.
"There are a lot of women that are like, 'Oh, I haven't had a man in X amount of years,' and I'm like, 'You don't need a man, first of all. And when you realize that, they're gonna all come flocking," Metz shared. "Confidence is attractive."
That lesson, the actress explained, is one of the things that separates her from her on-screen character.
"I am a true plus-size woman and have battled weight throughout my life, but I think that I've kind of come to terms with things that Kate is still struggling with," she said. "I truly believe that if you don't accept yourself for who you are right now, you can't ever become the person you are meant to be."
"Kate is solely fixed on that because she feels that if she loses the weight, all of her problems will be solved," Metz shared. "What she's coming to discover is, that's not necessarily true. Because it's not the food that's the issue, it's everything she's been stuffing down with the food."
When it comes to her own body-image perception, Metz admits that "part of me will always care" about what people think of her, "because I care deeply about people and their feelings."
"But then I have to realize that people have their own opinions and their perception is their own reality and it really has nothing to do with me. Nothing," she added. "It's not easy, but I just have to remind myself [of that]."
For Metz, she says she finds inspiration in other bold, self-determined actresses who refused to let the world dictate how they should look or who they should be.
"I have seen other actors and women who have never compromised who they were, like Whoopi Goldberg," Metz recounted. "She was unapologetically who she was. And that's like, the beauty of all of us."
"I've learned from a lot of women in my life and my mom included, my grandmother," she said, adding that getting the chance to play a strong, self-determined woman is "the cherry on top of everything."
On the show, Kate came to reject the idea of going under the knife for gastric bypass surgery, and Metz said she feels the same way as her character, explaining that a "medical emergency would have to happen" for her to consider it. Being overweight and "filling the void with food" isn't the cause of personal unhappiness, she explained. "The food is the symptom."
"If you can't get the mental and emotional clarity to collectively move in your journey, physically, it's never going to work," she said. "I've had friends who have had the sleeve or a bypass and who have gained the weight back and who were more miserable when they're thinner. It's not about what we look like, it's how we feel and how we are mentally and emotionally."
"When my parents got the divorce, it was like, we just didn't have a relationship," Metz recalled. "There was a lot of resentment toward him about leaving and how do you leave your children. We never know people’s full [stories] and I don’t obviously know everything that he was going through." Check out the video below to hear more.
This Is Us airs Tuesdays at 9 p.m. ET/PT on NBC.