It's the first time Australia and New Zealand have met in the global showpiece with so much at stake.
The Kiwis, it's more than a sport - it's a religion.
New Zealand school children across the country have been practicing their haka - New Zealand's version of the challenge that has become an essential prelude to international rugby tests involving Polynesian teams.
Auckland-based Italian chef Massimiliano De Caro has even taken three months to prepare special black mozzarella cheese balls in honour of the All Blacks.
"I want to support in this big event the All Black and I dedicate the black mozzarella for All Black. Today it's ready," De Caro told TVNZ.
In Australia, excitement is also building across all ages.
A group of Sydney school children were on hand yesterday to launch the Australian Rugby Union's latest supporter drive, lighting the Sydney Opera House in the national team's green and gold colours.
Support has also come in from other sports.
"Michael Cheika has done an outstanding job, taking pretty much a transitional team, like Ange Postecoglou with the Socceroos, same type of people, same type of jobs. Michael's walked in there and done a fantastic job and let's hope they can finish it off," said Sydney FC coach Graham Arnold.
And Australian NBA basketballer Matthew Dellavedova posted this message on Twitter:
Well-wishes even came in from the unexpected.
"The Wallabies are going to have the power of Chuck Norris' spirit there," the Hollywood actor and martial artist told the Nine Network.
For Jeremy Paul, former Wallaby and 1999 World Cup winner, the stakes couldn't be higher.
"We haven't won anything in 13 years. The last time we were in a world cup final was 2003, last time we won a world cup was back in '99. We haven't won a Bledisloe Cup series in 13 years," Paul said.
Paul moved to Australia from New Zealand at age 13 and went on to play the All Blacks many times. He knows all too well the fierce battle that awaits the Wallabies.
"It is going to be like climbing Mount Everest 50 times for the Wallabies," he said.
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