After winning her third BAFTA award for Best Supporting Actress in Steve Jobs, Kate Winslet revealed she was fat shamed in high school.
Backstage, Winslet, 40, dedicated the award "to all the young women who doubt themselves because you shouldn't be doubting. You should just be going for it."
Before her dedication, the actress shared a story about the time she was criticised for her weight.
"When I was younger, when I was only 14, I was told by a drama teacher that I might do okay if I was happy to settle for the fat girl parts," Winslet said backstage.
"Look at me now, look at me now," she added.
Instead, Winslet wants girls to ignore the comments and "keep on going".
"And what I feel like saying in those moments is any young woman who has ever been put down by a teacher, a friend, or even a parent: Just don't listen to any of it, because that's what I did," Winslet continued.
"I didn't listen...and I overcame all my fears and I got over a lot of insecurity."
In 2011, Winslet said she promotes a healthy body image at home with her then ten-year-old daughter, Mia, by shaking her butt.
In an interview with German magazine Brigitte, the mother of three said: "I accept my body. I accept how I am and make the best of what I am given.
"Children orientate towards examples. That's why I talk solely positive about my body in front of my daughter. I say things like 'Hey, look at my strong arms!' Or I shake my butt and say 'Look at my fabulous butt!' I do that deliberately."