Before enchanting audiences and cementing her status as a household name by playing the beautiful Rose in 1997's blockbuster romance, Titanic, Kate Winslet is revealing that her life pre-fame was significantly less glamorous.

"I had been bullied at school," the Oscar-winning star admitted during Wednesday's annual WE Day UK event in London in a speech targeting childhood bullying. "They called me Blubber. Teased me for wanting to act. Locked me in the cupboard. Laughed at me."

Opening up about her own experience with fat shaming, the mom-of-three dished, "I was even told that I 'might be lucky with my acting, if I was happy to settle for the fat girl parts," which led to the star doubting herself and her abilities.

"I felt that I wasn't enough, I wasn't good enough. I didn't look right, and all because I didn't fit into someone else's idea of 'perfect.' I didn't have the perfect body," she said.

Luckily for us, Winslet—who would go on to star in films like Eternal Sunshine of the Spotless Mind, Revolutionary Road, and Finding Neverland — kept auditioning for school plays, saying, "I loved acting. It didn't matter how big or small the parts were. I wanted to be great and I was determined to keep learning."

The actress's big break came in '97, when she received the call to star opposite Leonardo DiCaprio in James Cameron's epic saga about the RMS Titanic.

"The most unlikely candidate, Kate from the sandwich shop in Reading, suddenly acting in one of the biggest movies ever made!" Winslet shared of her disbelief.

The British beauty, who later snagged numerous honors and was the youngest person to be nominated for six Academy Awards, concluded, "You can be from anywhere, and you can do anything. Believe it."

Talk about the best way to stick it to the haters!