Kate Dickie (born July 4, 1971) is a Scottish actress who played Armitage Hux's First Order monitor in Star Wars: Episode VIII The Last Jedi. She is also known for playing Lysa Arryn on the fantasy drama television series Game of Thrones and Lex in the BBC series Tinsel Town. Other roles of note include the security operative Jackie in the 2006 feature film Red Road, for which she won several awards; the medic Kate Ford in the 2012 science-fiction film Prometheus, and Katherine in the 2015 horror film The Witch, where Dickie plays the wife of fellow The Last Jedi actor Ralph Ineson; and Sorority, a 2022 drama where she plays the protagonist's estranged mother.