Labour Party MP Lianne Dalziel has filed her nomination for the Christchurch mayoralty.
The Christchurch East MP was nominated by former National Party Cabinet minister Philip Burdon and a spokesperson for non-profit community group The Ministry of Awesome, Kaila Colbin.
Ms Dalziel said on Friday their support symbolises the fact that the election is about more than party politics, and is about getting the right people involved in rebuilding the earthquake-hit South Island city.
She said she would resign as an MP the day before the election results are announced.
Mayor Bob Parker announced on 5 July that he would not seek re-election, saying he is exhausted after six years in office and can't sustain the stress of the job for another term.
In June, Ms Dalziel launched her campaign, saying the culture within the council needs to change. She is the only declared candidate.
Nominations close on 16 August and results will be known on 12 October.