Labour's latest leadership hopeful admits he may be the underdog but his entry could throw the contest wide open if he can persuade enough MPs he is the clean break the party needs to get back on track.
Andrew Little will go up against Grant Robertson and David Cunliffe while David Parker and David Shearer are still possible late entries before nominations close on Tuesday.
Several Labour MPs are still waiting to see if others put their names in before deciding who to back, but Little is likely to get at least six or seven MPs. Those who could opt for Little include the likes of Iain Lees-Galloway, Kelvin Davis, Rino Tirikatene, Damien O'Connor, and Mr Parker and Mr Shearer if they do not stand themselves.
Mr O'Connor, who infamously described Labour's list ranking committee in 2011 as "self-serving unionists and a gaggle of gays" said he would not make a decision until all candidates were known.