Adrianna Jean Bertola (born 9 February 1999) is an English actress and singer who rose to attention playing Gretl von Trapp in The Sound of Music and Sharice Brooks in Casualty. She also played Violet Beauregarde in Charlie and the Chocolate Factory the Musical from May to November 2013. On 22 September 2014, Bertola released her first single, titled "Fire and Ice", through the Spirit Young Performers Company.