Froseth started modeling after being discovered on a catwalk audition at
Ski Storsenter in Norway, and was also scouted by
IMG Models while in New Jersey at a local mall fashion show. She has modeled for brands such as
Prada,
Armani,
Miu Miu and
H&M. Her acting career began when a casting director found her photos and encouraged her to audition for the film adaptation of
John Green's novel
Looking for Alaska. This film adaptation was never made. In 2016, she was cast in the pilot for a potential series adaptation of
Let the Right One In. Froseth began her acting career with the 2017 film
Rebel in the Rye. In 2018, she starred in two Netflix movies,
Sierra Burgess Is a Loser and
Apostle, and a Sky miniseries,
The Truth About the Harry Quebert Affair. On May 9, 2018, it was announced that Hulu would be adapting the John Green novel
Looking for Alaska into an
8-episode miniseries. On October 30, 2018, Green announced that Froseth would be playing Alaska Young, one of the main characters. She stars in the 2021
Amazon Prime Video film
Birds of Paradise directed by
Sarah Adina Smith. In June 2022, Froseth was cast to star in
Apple TV+'s
The Buccaneers. That same year Froseth played the protagonist, Coby Rae Dellum, on the first episode of the second season of the
FX on Hulu series
American Horror Stories which aired on July 21, 2022. Also in 2022 she starred in the
Lena Dunham sex comedy Sharp Stick and
Daniel Goldhaber's action-thriller
How to Blow Up a Pipeline. She also portrayed a young
Betty Ford in the limited series
The First Lady (2022). ==Personal life==