Australia has been drawn to play Wales, Georgia, an Oceania team and a team from the Americas in their group.
The Wallabies, currently ranked No.3 in the world, cannot face the All Blacks until the semi-final.
But Aussie coach Michael Cheika said the team still needs to be switched on and ready for some very tough opponents.
“Georgia, Australians probably won’t know a lot about them but they’re a team being run by a few Kiwi lads over there (including coach Milton Haig) and they’re on the up and up,” Cheika said.
“They have strong forward play and they have some gas out wide and between now and 2019 I suppose we will learn a bit more about them.
“They won’t be easy games. When you’re standing out there singing the anthems, it’s 0-0, all bets are off.
“The minute you stop thinking like that, it’s the minute you’re dead in the water.”
There are still eight qualification spots up for grabs, with teams from Europe, Oceania and the Americas all still to finalise qualification.