The winners of the vote from the panel and the public will be revealed every Monday at 8.30pm on the Breakdown on Sky Sport 1, culminating in a gala event celebrating the winners in September.
You can watch the Breakdown's first Greatest XV segment in the video player above.
First up for voting: the front row.
Vote via Facebook using the links below (voting closes midnight Wednesday).
Loosehead prop
Wilson Whineray (32 tests from 1957-1965)
Tony Woodcock (118 tests from 2002-2015)
Craig Dowd (60 tests from 1993-2000)
Steve McDowall (46 tests from 1985-1992)
Vote here.
Hooker
Ron Hemi (16 tests from 1953-1959)
Sean Fitzpatrick (92 from 1986-1997)
Keven Mealamu (132 tests from 2002-2015)
Dane Coles (74 tests from 2012-present)
Vote here.
Tighthead prop
Kevin Skinner (20 tests from 1949-1956)
Ken Gray (24 tests from 1963-1969)
Olo Brown (56 tests from 1992-1998)
Owen Franks (108 tests from 2009-2019)
Vote here.
Next week, the front row winners will be revealed and the panel will debate the greatest locks.
Watch NZ's Greatest XV on the Breakdown on Sky Sport 1 every Monday at 8.30pm or catch up on nzherald.co.nz/sport every Tuesday.