She was a Labor Party member of the Tasmanian House of Assembly, representing the outer suburban Hobart seat of Franklin.
[2] In the 2006 Tasmanian state election Wriedt suffered a decline in her primary vote, almost losing her seat to Liberal challenger Vanessa Goodwin, after criticism of the government over the Essential Learnings Curriculum.
[4] On 31 July 2008, Wriedt was the subject of a comment, which some described as a "lewd" remark, made by Sam Newman on the Nine Network's AFL Footy Show.
[8][9][10] Premier David Bartlett announced that she would require a period of treatment and recuperation, and that he would be temporarily handling Wriedt's ministerial duties.
On 12 September 2008 Premier Bartlett asked the Governor of Tasmania Peter Underwood to withdraw Wriedt's commission, ending her appointment as a minister.
[13] On 8 March 2017, during an International Women's Day panel discussion on ABC Local Radio, Wriedt clarified that she was not a member of any political party, saying that after she retired from Parliament in 2009 she “did not receive a membership renewal form from the ALP, which I took as a message that I was no longer welcome”.