Why is Kylie Jenner famous?

Due to her older half-sister, Kim Kardashian. Kim let out a sex tape with her ex boyfriend in the early 2000s that went viral. At the same time, Kim and her family were filming the first season of their reality tv show - Keeping Up with the Kardashians. At the time, Kylie was in elementary school. Growing up in the spot light for the remainder of her childhood as well as launching a cosmetics line that became a billion dollar business, made Kylie famous.