The win was made up of $4m from Powerball first division and $333,333 from Lotto first division.
The couple claimed the prize on Monday at the store where the ticket had been purchased – Whitcoulls George St in Dunedin.
Saturday night’s other big prize also went to a player in the south of the country.
The special $1m prize was part of Lotto NZ’s “biggest Christmas ever” promotion. It was won by a player who purchased his ticket at Plaza Supervalue in Invercargill.
Another 100 prizes of $50,000 were won by players from throughout New Zealand as part of the promotion.