According to the Los Angeles Times, no one really expected The Kissing Booth to be a hit film, let alone a viral sensation. Despite the critical panning, though, that's exactly what happened. The success of the film also skyrocketed the lead stars into celebrity. That's when King's Instagram following went from 600,000 to millions nearly overnight.

Since then King's following has only grown larger, something the star attributes to her online authenticity. in an interview with W magazine, King said she thinks "the reason people follow me and why I love Instagram is because I am myself." She continued, saying, "It's important to me to remain true to myself on Instagram, and it's also important to have certain things be just for me."

King also curates what she shares in order to keep it real. "I look at my Instagram and there are so many weird, fun things on there I'm happy I shared because it was such an organic moment," she continued. She added that it's also important to maintain that sense of spontaneity.