Thea Sofie Loch Næss (born November 26, 1996) is a Norwegian actress known for her performances in film and television. She was born in Kristiansand, Norway, and started acting at the age of 8.
She gained recognition for her leading role in One Night in Oslo (2014) and later starred in The Last King (2016) as Kristina of Norway. In 2018, she played the villain Skade in the third season of The Last Kingdom on Netflix. More recently, she portrayed Marianne Ihlen in the 2024 biographical mini-series So Long, Marianne, which explores the life of Leonard Cohen’s muse.
Beyond acting, she studied drama at Hartvig Nissens School in Oslo and has appeared in various Norwegian and international productions.

The Ugly Stepsister
Agnes
2025

La Palma
Marie Ekdahl · (4 episodes)
2024

So Long, Marianne
Marianne Ihlen · (8 episodes)
2024

Twilight of the Gods
Thyra (voice) · (8 episodes)
2024

Invitation to Self-Examination
2024
Tragedy Babes
Mckenna
2024

Evil
Marja · (6 episodes)
2023

A Happy Day
2023

Lykkejeger
2023

A Storm for Christmas
Sara · (6 episodes)
2022

Revisited
Tyra
2022

Arctic Void
Lucy
2022

Delete Me
Marit · (7 episodes)
2021

Tyger Tyger
Emerald
2021

Project Z
2021

Good Luck
Helene
2020

When You Left
Sarah
2020

Hjerteslag
Mio · (56 episodes)
2019

Wisting
Linnea Kaupang · (4 episodes)
2019

The Last King
Kristin
2016

Mogadishu, Minnesota
Lacy
2016

The Last Kingdom
(10 episodes)
2015

Dryads - Girls Don't Cry
Thea
2015

Polaroid
Linda
2015

One Night in Oslo
Thea
2014
X
Pernille

High Point
Benedicte
2014

Ice Skater
Emily

The Last Kingdom
Skade · (1 episode)
2015

Nytt på nytt
(1 episode)
1999