Former All Black skills coach Mick Byrne is being credited with the Wallabies' resurgence.
Aussie Byrne, who left the All Blacks following their World Cup defence in 2015, is highly regarded for his rugby knowledge and man management skills.
England coach Eddie Jones says Byrne has made a big difference since joining the Wallabies.
"They're probably the form team in the world at the moment," Jones said.
"There's some really good coaching. Mick Byrne has definitely made a difference as a skills coach. You can see his influence on the team. Their selection has been good, their defence is very good and their set-piece is strong."