Theresa Birgitta Brønnum Scavenius[1] (born 26 July 1984[2]) is a Danish politician who currently serves as an independent member of the Folketing.

She was a candidate to succeed Uffe Elbæk as leader of the party, after he resigned in February 2020, but lost to Josephine Fock.

In September 2023, after being stripped of her committee assignments and excluded from The Alternative's parliamentary group, Scavenius resigned as a member of the party.

In 2005 she started to study German at the University of Copenhagen, and wrote her bachelor's thesis about Thomas Mann in 2007.

[11][4] Scavenius was one of 301 Danish researchers who in May 2018 published an open letter, calling politicians to prioritise a more ambitious climate policy above economic growth.

[16] Scavenius joined The Alternative in December 2017, and was a candidate in the 2019 general election, running in the North Zealand constituency.

[26] The election of Fock caused a leadership crisis in which four of the party' five members of the Folketing, including Elbæk, left The Alternative.