She is known for A Terrible Woman (2017), Department Q: A Conspiracy of Faith (2016), Splitting Up Together (2016), Raised by Wolves (2020–2022) and House of the Dragon (2024).

[1] From 2015 to 2016, Collin was part of the Mungo Park Theatre ensemble, where she played in Hans Christian Andersen's fairytales, Boys Don't Cry and Hamlet.

[citation needed] In 2017, Collin was nominated for the Danish equivalent of the Academy Award, the Robert Award, for her supporting role of Rakel, the religious mother of two kidnapped children in the Danish box office hit Department Q: A Conspiracy of Faith directed by Hans Petter Moland.

[2] In 2019 Collin appeared in Daniel Borgman's Resin, for which she was nominated for a Robert Award for Best Actress in a Supporting Role.

In 2020 she starred in Aaron Guzikowski's sci-fi drama series Raised by Wolves from HBO Max.