Conservative Party leader Colin Craig wasn't even the legal voting age when he ticked his first ballot paper.
His father took the then 13-year-old into the polling booth in 1981, but restricted his son's decision to three candidates, Craig said of the caper.
"I don't want my father arrested because of this story," he said, laughing.
Several party leaders were — unsurprisingly — heavily involved in the campaigns of those they gave their first vote.
Internet Party leader Laila Harre backed Labour Party Eden electorate candidate Richard Northey in 1984. "I was born left."
Act Party leader Jamie Whyte also sweated his way to the polling booth in 1984 — knocking on doors and handing out flyers for New Zealand Party Pakuranga candidate Josephine Grierson.
Maori Party co-leader Te Ururoa Flavell and United Future leader Peter Dunne rewarded Labour candidates with their first votes, although the youth vote was not encouraged.
"The parties did have youth wings but they were tolerated rather than involved," Dunne said.
Prime Minister John Key and Labour leader David Cunliffe both voted in favour of the parties they would eventually lead, Cunliffe's first vote in 1984 prompted by a desire to "get rid of Rob Muldoon".
Brisbane-born Green Party co-leader Russel Norman's first trip to the ballot box — ticking Labor in the 1986 Queensland election — was fuelled by a desire to oust controversial premier Joh Bjelke-Petersen.
Winston Peters wouldn't say who he picked when aged 21 in 1966.