Background
Montelius grew up in Täby, Sweden and went to school at the Eriksdalsschool.
Montelius grew up in Täby, Sweden and went to school at the Eriksdalsschool.
She has written several plays, has had a book published and also worked as an artistic director During her teenage years, she worked at a library at Medborgarplatsen and later worked for the Dramaten and Teater Plaza. At Plaza she started a long co-operation with actor and director Thorsten Flinck.
She was a director and actress for his shows before starting to write her own work.
In 2000, she made her debut as a playwright with the play Usch, nu blev jag lite mulen, and has since written fifteen more plays. In 2011 she was appointed artistic director for the Teater Brunnsgatan Fyra Theater, a job she took over from her mother.
In November 2013 she had her first book published, Främlingsleguanen, which was published by Bokförlaget Atlas. In 2013, Montelius was a contestant on På spåret at SVT along with Dominika Peczynski.
She hosted her own episode of the popular Swedish talk radio show Sommar i P1 in summer 2014.
Her episode was broadcast live while most Sommar i P1 episodes are pre-recorded and then aired. Her episode was reviewed by Svenska Dagbladet, who described it as "controlled madness and seductive".