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Don't judge a book by its cover. "This Is Us" star Chrissy Metz knows all about the clich├ęs when it comes to bodies, and in her case she says it's true.

The plus-sized actress says her body doesn't define her.

"I don't find my value in my body or my weight. It's really more about who I am and what I can offer as a human being to the people in my life and the people in the world," she told the "Today" show on Thursday. "I know that sounds corny. And I know you've heard it before. But it's really true: We're so much more than our bodies."

While Chrissy embraces her weight, her character on NBC's "This Is Us," Kate, doesn't have the same mentality and struggles with her weight. Kate attends weight-loss therapy classes.

"It's impossible to accept love from anyone else if you don't love yourself," she said. "It's a big issue particularly for us plus-size ladies and for anyone dealing with weight, because we're not taught to love ourselves or be our own cheerleaders."

Chrissy is her own cheerleader and knows her value both on screen and in real life. And although she is making a name for herself in Hollywood, she knows there are things that she has to deal with that other actresses don't, especially when it comes to style.

"It can be very hard to find clothing for different body shapes. After all, there are only, what, five companies for plus-size women? Just because we're a bit curvier doesn't mean we don't want to look great," she said. "Until you love yourself, until you really believe that, you're stopped in your tracks. That's why it's so important to wear what you want to wear and be who you want to be."