The Wallabies have called Hamish Stewart, Darby Lancaster, Tom Hooper and Harry Hoopert into the squad ahead of the Scotland Test.
The group will link up with the Test squad after featuring for Australia XV during their defeat to England A last weekend.
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Stewart serves as inside centre cover, with Hunter Paisami remaining in Australia at the start of the Grand Slam tour.
It comes as Samu Kerevi was red carded during the 52-20 win over Wales for a high shot on Jac Morgan.
He joined fellow centre Josh Flook, who was added following a calf injury to Dylan Pietsch.
Stewart and Lancaster are part of the 17 debutants used by coach Joe Schmidt in 2024, with Lancaster also flown into the squad for the second Bledisloe Test.
As for Hooper, the backrower has been a regular under Schmidt in 2024 and was one of Australia’s best in the 38-17 defeat to the English.
Hooper featured off the bench against Georgia and South Africa after starting every Test at the 2023 Rugby World Cup.
Hoopert rounds out the new inclusions in the squad as added prop cover, with James Slipper taken off late in the win over the Welsh.
Slipper came on at half-time for Angus Bell, with Bell returning to the field 20 minutes later for the experienced loosehead due to injury.
The Wallabies have arrived in Scotland ahead of Monday’s (AEDT) Test with the Grand Slam dream still alive.
The side is set to be boosted by the return of captain Harry Wilson after he missed the win with a concussion.
Prop Taniela Tupou is still dealing with a knee injury whilst scrum-half Jake Gordon is expected to be available after his nasty cut in the win over England.
