Former Labor senator Katy Gallagher will attempt to win back her ACT seat after being disqualified from parliament over her dual citizenship.
Ms Gallagher, who was kicked out of parliament last month, has emailed Labor members to indicate her intention to nominate for preselection.
She remained committed to representing her home town in the national parliament and helping to elect a Labor government.
"These reasons remain as relevant for me today as they did back then and so I have decided to put my hand up for preselection for the Senate in the next federal campaign," she posted to social media on Friday.
Her ACT seat has been filled by David Smith, the former territory director of Professionals Australia.
Incoming senator Smith said it was now for ACT Labor members to decide who should represent them at the next election.
He said the fight for Labor values was too important to give away.
"There is a job to do now in representing the people of the ACT. I am doing that job now and with the support of Labor members will continue to do so," he said.
"I am grateful for the many messages of support I have had from Labor members throughout the ACT and look forward to the preselection contest."
Ms Gallagher said she decided to stand for the Senate because there were already good Labor representatives for Canberra in the lower house.
Her pursuit of a return to the Senate quashes speculation she may have been eyeing off a third federal lower house seat being created in the ACT.
Labor frontbencher Anthony Albanese welcomed her intention to claw back the Senate spot.
"Katy Gallagher was making an outstanding contribution, she has more to contribute and I'm sure that everyone in Labor's leadership team will welcome that," he told the Nine Network.
Penny Wong, the leader of the opposition in the Senate, is delighted.
"Katy is a woman of great integrity and ability, and a key part of Labor's Senate leadership team," Senator Wong said.
"Katy is, quite simply, too good to lose. I look forward to welcoming her back to the Senate."
Labor senator Jenny McAllister described her ousted colleague as a person of intelligence, principle and depth, while opposition frontbencher Andrew Giles lauded her capacity to lead debate and drive change.
The High Court last month ruled Ms Gallagher was ineligible to stand for the 2016 election because she was still a British citizen when the writs were issued.
The ruling forced the resignation of lower house Labor MPs Susan Lamb, Josh Wilson and Justine Keay, along with Centre Alliance's Rebekha Sharkie, who faces by-elections next month.