She was born in Malmö,[2] Sweden while her father was attending graduate school there[3] but raised mainly in Bellevue, Washington.
[4] She attended Bellevue High School and studied dance at Cornish College of the Arts and acting at Seattle Children's Theatre.
She is perhaps best known for her role in the 2012 drama The Sessions alongside Helen Hunt, William H. Macy and John Hawkes.
On television, Marks has the recurring role as Monte Porter in the Freeform (formerly ABC Family) drama series, The Fosters.
In 2016 she starred in The Model Apartment, by Donald Margulies at the Geffen Playhouse [7] She filmed the independent feature The Last Champion in early 2017.