New Zealand's women's team - known as the Black Ferns - have won five of the last six World Cups, beating England 41-32 in the 2017 final.
"Interest in rugby always increases in a World Cup year and that'll be amplified as the All Blacks look to make it three world titles in a row".
"I would also like to thank Australia for their exceptional bid".
It will be the first time that the tournament will be held in New Zealand, and will follow on from the enormously successful 2017 edition.
She was also rapt for those in New Zealand who had worked on the bid: "I was kind of dreading coming back home and facing all those of people and what they were going to say".
He said: "This is a significant and exciting day for the Challenge Cup, and the game's relationship with Wembley Stadium".
"That's certainly something we'll be talking to World Rugby about".
Games will be split between Auckland and Whangarei, with venues including the legendary Eden Park where the All Blacks have won two men's World Cup finals.
Auckland and Whangarei have been confirmed as the host cities, and this will be the first time that the WRWC has been played in the Southern Hemisphere.More news: PlayStation 4 Black Friday deals launched
"Every member of the World Rugby council would have got a fully documented appraisal of the two bids", Beaumont added.
The tournament's shift to the southern hemisphere will reflect the rapid growth in the women's game in Australia and New Zealand.
Reigning champions New Zealand will host the 2021 Women's World Cup, World Rugby announced Wednesday.
"More of those teams now want to be in the Women's world cup and expansion in the women's world cup will be a topic for discussion".
For a format once feared endangered by the rise of sevens, the figures are hugely encouraging, not least because Super W is gearing up for its second season and Wallaroos coach Dwayne Nestor will be looking for the next generation to take to Auckland in 2021.
World Rugby Chairman, Bill Beaumont, said, "Women's rugby continues to grow with over 2.4 million women and girls playing rugby at all levels, accounting for more than a quarter of players globally".
"You listen to the presentation and the passion. you know it's the passion for the sport and everybody knows what rugby means to Kiwis, it's their DNA isn't it". That came out in the bid.
"It's also a great complement to New Zealand's ongoing hosting of the 8th International Working Group on Women in Sport secretariat, culminating in the 8th World Conference of the IWG in 2022".