Phil Goff will confirm his bid to become mayor of Auckland on Sunday.
The senior Labour MP and widely-tipped front-runner for Auckland's top job says "an announcement" will be made at an invite-only function at Westhaven Marina.
Councillors and local board members are on the 1:30pm guest list and while it's understood Goff will stop short of launching his actual election campaign - remaining MP for Mount Roskill - he will formally announce his decision to stand for the mayoralty and replace Len Brown in next October's Local Government elections.
Goff declined to discuss the announcement but finally appears ready to put an end to months of speculation, exactly two weeks since Brown confirmed he would not seek a third term in office.
Brown took himself out of the running a fortnight ago, admitting the fallout from the extra-marital sex scandal which rocked his mayoralty in 2013 had inflicted too much damage to have a chance of re-election.