Cox was born to a British father and an Irish mother in Vienna. Her parents later divorced. Both of them are pianists, who originally came to Vienna on a grant for musicians. Cox grew up in Vienna and graduated from high school in 2003. She developed an interest in acting after performing in a play as part of her English classes during her final year in high school. After her graduation she went on to study acting at the Max Reinhardt Seminar. In 2008 she was under contract as a stage actor at the Theater in der Josefstadt in Vienna. In 2011 Cox moved to Berlin and since then she has appeared in various movies and series on German and Austrian TV, among them several Tatort movies. Since 2015 she plays the role of the viking woman Brida in the TV series The Last Kingdom, which made her known to international audiences.
Brida
Film 2023
Anita
Film 2010
Lisa Sobiri
Film 2023
Mizzi
Film 2011
Laura
Film 2011
Gretchen Dutschke-Klotz
Film 2009
Maja Hönow
Film 2010
Julia Brandt
Film 2023
Alma Mahler
Film 2023
Kellnerin
Film 2011
Jana Skoff
Film 2022
Mel
Film 2013
Martha Müller
Film 2014
Emma Turgut
Film 2023
Jakobs Tochter Mascha
Film 2010
Agnes, junge Frau in Auschwitz
Film 2012
Miriam
Film 2018
Magdalena
Film 2015
Milena 'Milli' Neubert
Film 2011
Ella
Film 2018
Nursing Home Manager
Film 2018
Lilly
Film 2019
Therapist
Film 2018
Meta Jurkschat
Film 2019
Caroline Mathilde
Film 2012
Film 2020
Tascha
Film 2021
Katharina
Film 2021
Mercia
Film 2025
Sonja Omminger
Tv 2013
Heike
Tv 1971
Jeanette Wilson
Tv 2003
Miranda Kador
Tv 1970
Brida
Tv 2015
Roswita Mader
Tv 1970
Clara Andersen
Tv 2023
Self
Tv 2017
Judith Stoll
Tv 2005
Lucie Thieme
Tv 2009
Hannah Falck
Tv 2001
Ulrike Gronau
Tv 2015
Tv 2018
Edith Egger
Tv 1981
Gina Prinz
Tv 2001
Tv 2020
Diana Weininger
Tv 2009
Manuela
Tv 2013
Sybille Wildering
Tv 1970
Sara Schiller
Tv 2024
Katharina Diemel
Tv 2024
Self - Guest
Tv 2015
Frieda Borck (Folge 1)
Tv 2014
Self
Tv 2003