In short:

Rugby sevens matches have been added to what was a Wallabies-Wallaroos double-header in Sydney.

Rugby Australia has added women's and men's sevens to the day of international rugby in Sydney.

What's next?

The Wallabies host the All Blacks and Wallaroos play Scotland at Stadium Australia on October 17. 

Australia's sevens teams will share the stage in a scheduling first, with the Wallabies and Wallaroos creating a Bledisloe Cup quadruple-header in Sydney.

The Stadium Australia Test against the All Blacks on October 17 already had a support act secured, with the Wallaroos due to host Scotland for the first time in their WXV Global Series clash.

Now two more fixtures will be added to the ticket, with Australia's world champion sevens women to face rivals New Zealand and the men up against two-time Olympic gold medallists Fiji.

"This is an historic moment for Australian rugby, with all four of our Teams In Gold competing on the same pitch, on the same day, on an unmissable occasion," Rugby Australia chief executive Phil Waugh told AAP.

"The day will showcase the very best of rugby with our elite male and female players across the XVs and Sevens formats taking on famous rivals from around the world in an unprecedented line-up of international rugby.

"We look forward to celebrating this extraordinary occasion with our great Australian rugby community and we thank our friends from New Zealand Rugby, Fiji Rugby Union and Scottish Rugby for helping make this day a reality."

The Wallaroos will begin the action before the men's and women's sevens outfits take the field, followed by the Wallabies, who will complete the four-course menu with a late afternoon kick-off at the venue set to host next year's World Cup final.

AAP