Movies
* The Killing of a Sacred Deer (2017): She played the role of Anna, a psychotherapist, in this critically acclaimed psychological thriller directed by Yorgos Lanthimos.
Television
* The Crown (Season 3, 2019): She portrayed the role of Princess Marina of Greece and Denmark, a member of the British Royal Family, in this popular historical drama series.
* The Nevers (2021-present): She plays the role of Amalia True, a strong and complex character, in this fantasy drama series created by Joss Whedon.
* The Lord of the Rings: The Rings of Power (2022-present): She has a recurring role as Isildur in this highly anticipated epic fantasy series.
These are just a few of the projects Marianthi Sontaki has been involved in. She is a talented and versatile actress with a growing filmography.