Gaunt attended the Godolphin and Latymer School in London. In 2013 she graduated with a Double First in English from Newnham College, Cambridge.
Gaunt portrayed Pansy Parkinson in Harry Potter and the Prisoner of Azkaban and Jessica Fuller in The Face of an Angel. She has portrayed Wilhelmina "Willow" Moreno on The Royals since 2015.
