Mia Soteriou is an actress and musician. She is best known for her role in Mamma Mia!, in which she acted as well as working as a vocal coach. She has also appeared in British TV series such as Holby City, The Bill and Absolutely Fabulous. In Game of Thrones she played the role of Mirri Maz Duur and was confirmed in the role on 29 September 2010.