Even before Sofia Carson was named “Netflix’s first bona fide movie star” by Vanity Fair, her My Oxford Year costar Corey Mylchreest was certain acting with her would ensure their project’s success. “As soon as I knew Sofia was involved, I thought, ‘Here's a Netflix number one,’” Mylchreest tells Teen Vogue, laughing.

What happens at the end of My Oxford Year? Why does Jamie die? Sofia Carson breaks down the ending of the show.

A decade ago, she had never stepped onto a feature-film set. Today, the Disney Channel alum sits atop a streaming empire, headlining some of Netflix’s most popular titles—and setting expectations high for her new project,