Sten was born in Copenhagen, Denmark to Danish painter Nina Sten-Knudsen with Swedish heritage and a Congolese father.
[11] Sten has also written two episodes of David E. Kelley's series Big Sky, and wrote, directed, and produced the short films Wild Things Run Free and When It Burns.
[1][12] In 2018 Sten was named to the Tracking Board's Young & Hungry List, which showcases the top 100 new writers as voted on by Hollywood's most influential.
[1] As an actor, Sten played the lead role of Jillian Hope Hodgson in the fourth season of the television show Channel Zero: The Dream Door.
She portrayed Liz Tremayne in the DC Universe television series Swamp Thing, which also starred Crystal Reed.