New Zealand won their fifth Women's Rugby World Cup previous year after they beat England 41 - 32 in a pulsating final in Belfast.
"Congratulations to New Zealand on being elected women's Rugby World Cup 2021 host", World Rugby chair Bill Beaumont said in a statement.
"If I was a Kiwi, I'd think it's sort of coming home now in a way, really", he said.
It is, of course, the scene of one of South Africa's most famous rugby days following their heroic 36-34 win against New Zealand at the venue back in September.
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Palmer, a former Black Fern and current New Zealand Rugby board member is one of the key presenters of the New Zealand bid and concedes she's feeling tense ahead of the meeting.
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"We've really gained some momentum in the last couple of years and this would be the icing on the cake and this would truly show that we are world leaders and keen to develop the game in the Oceania region, do what we can to support the Pacific Island nations and really develop it in this part of the world".
"I would also like to thank Australia for their exceptional bid".
World Rugby chairman Bill Beaumont said he felt the decision was global recognition for the obsession for rugby in New Zealand.
"You listen to the presentation and it's the passion for the sport", Beaumont said. That came out in the bid. But in the case of the women's contest, it is simply a case of a presentation followed by voting on the same day.
"It's not very often we compete with Australia and think it's unfair to win but today was a day that could've gone either way", he said.
"Even though World Rugby made a recommendation for the men's World Cup last time and it wasn't followed, I still think it would be a good process for World Rugby to make a recommendation based on that analysis", Castle said.
"They both spoke very genuinely and directly to the councillors about the meaning of rugby in our country, the growth of the women's game and what it means to New Zealand to host these big events".