Greens MLA Shane Rattenbury has been elected speaker of the ACT Legislative Assembly.
Mr Rattenbury is one of four Greens holding the balance of power in the 17-seat assembly following a general election on October 18.
The minority Labor government did not nominate one of its seven MLAs for the speaker's position, opting to support Mr Rattenbury in a contest against the Liberals' Vicki Dunne.
Labor's Mary Porter was elected deputy speaker.
Labor leader Jon Stanhope was elected formally as the territory's chief minister.