Sienna Fizz is the star of the hit YouTube series "Family Fizz," where she appears alongside her older half-sister, Mia. Their popular YouTube channel is dedicated to family-friendly vlogs, silly challenges, and more, boasting over 490,000 subscribers and continuously growing. Sienna gained further recognition in 2018 when she appeared on "Little Big Shots." The channel originally started as Vegan Kid TV in July 2014 but later rebranded to Family Fizz to include a wider variety of content, including games. In addition to her contributions to Family Fizz, Sienna has her own personal channel called "Super Sienna," which is focused on game-related content. Sienna and Mia also co-manage a secondary channel called "The Fizz Sisters."