Personal Day—the skin care company launched this past year by actor Lili Reinhart—has been years in the making. As Reinhart’s 25 million followers on Instagram know, she has struggled with acne and skin care issues since she was 12 years old. Today, she’s proudly building a company and developing products alongside experts and dermatologists with the goal of helping herself and others with the same skin concerns. All the while, her acting career continues to prosper, with projects like the upcoming TV series "Hal & Harper" and the film "American Sweatshop," premiering at SXSW. In this revealing conversation, she’ll discuss the idea behind her company, how she spreads the word on social media, and how she balances personal happiness with the desire to create and to build.