Mary Kate Wiles is an American film and web series actress and producer. She is known for her award-winning portrayal as Ally in the film The Sound and the Shadow, in web series such as Lydia Bennet in the Emmy-winning Pride and Prejudice adaptation The Lizzie Bennet Diaries, as well as the audiobook of the sequel, The Epic Adventures of Lydia Bennet, as Zelda Waring in Squaresville, as Sansa Stark in Game of Thrones parody School of Thrones, Tatiana in "Spies Are Forever," Annabel Lee in Edgar Allan Poe's Murder Mystery Dinner Party, Artemis Schue-Horyn in Wayward Guide for the Untrained Eye, and Kat Van Tassel in Headless: A Sleepy Hollow Story.