Jacinda Ardern offers Scott Morrison wager on All Blacks vs Wallabies

New Australian Prime Minister Scott Morrison is going to have to start his leadership by paying out a wager to New Zealand Prime Minister Jacinda Ardern, after the All Blacks thrashed the Wallabies on Saturday night.

Ms Ardern joked that she had offered the wager ahead of the test at Eden Park, the second in the Blesisloe Cup series after the All Blacks beat their Australian counterparts last week.

"I'm yet to hear back but I'm feeling confident," she said when asked how she thought the match will go.  

She made the comments in a video posted on social media by the Black Ferns after they crushed the Wallaroos 45-17, in the first of the double-header games at Eden Park on Saturday night.

"I was just talking to one of the girls in the crowd who was totally inspired by what she saw out there today," Ms Ardern said in the video, which was also shared on the NZ Labour social media pages.

"The inspiration and the example that the Black Ferns are for New Zealand - not just women in rugby or women in sport. Just generally [the Black Ferns are] an amazing team."

While at the event Ms Ardern also bumped into Kiwi superstar Lorde, who was attending her first rugby test at Eden Park.

Ms Ardern posted a photo on Twitter of the two of them joined by Black Fern Kendra Cocksedge, with the 'Green Light' hitmaker bundled up in a thick puffer jacket against the Auckland cold.

"Great half time conversation at Eden Park tonight!" the photo was captioned.

On Friday, Ms Ardern offered her congratulations to Mr Morrison after he secured enough votes to oust former Prime Minister Malcolm Turnbull in a political spill. 

"Mr Morrison is familiar with New Zealand from his time working for New Zealand tourism and I'm sure that history will be really helpful as we build our relationship," she said in a statement at the time. 

The All Blacks destroyed the Wallabies 40-12 in a resounding defeat, locking away the Bledisloe Cup for another year.