Hugo Keenan is named at fullback for his 25th cap with Jimmy O’Brien switching to the left wing and Mack Hansenswitching across to the right.
Johnny Sexton will be partnered in the half-backs by Jamison Gibson Park.
Andrew Porter and Dan Sheehan are named in the front-row alongside last week’s captain Tadhg Furlong. James Ryanreturns to the second row to partnerTadhg Beirneand bothJosh van der Flierand Peter O’Mahony return to the back row with Caelan Doris switching from the blindside flank to number eight.
Joe McCarthy is joined on the bench by fellow Leinster Rugby players, Cian Healy and Jack Conan.
Ireland v Australia:
15. Hugo Keenan (Leinster/UCD) 24 caps
14. Mack Hansen (Connacht/Corinthians) 8 caps
13. Garry Ringrose (Leinster/UCD) 46 caps
12. Stuart McCloskey (Ulster/Bangor) 8 caps
11. Jimmy O’Brien (Leinster/Naas) 2 caps
10. Johnny Sexton (Leinster/St Mary’s College) 109 caps CAPTAIN
9. Jamison Gibson Park (Leinster) 22 caps
1. Andrew Porter (Leinster/UCD) 47 caps
2. Dan Sheehan (Leinster/Lansdowne) 12 caps
3. Tadhg Furlong (Leinster/Clontarf) 62 caps
4. Tadhg Beirne (Munster/Lansdowne) 35 caps
5. James Ryan (Leinster/UCD) 47 caps
6. Peter O’Mahony (Munster/Cork Constitution) 88 caps
7. Josh van der Flier (Leinster/UCD) 44 caps
8. Caelan Doris (Leinster/St Mary’s College) 22 caps
16. Rob Herring (Ulster/Ballynahinch) 30 caps
17. Cian Healy (Leinster/Clontarf) 120 caps
18. Finlay Bealham (Connacht/Buccaneers) 26 caps
19. Joe McCarthy (Leinster/Dublin University) *
20. Jack Conan (Leinster/Old Belvedere) 32 caps
21. Craig Casey (Munster/Shannon) 6 caps
22. Jack Crowley (Munster/Cork Constitution) 1 cap
23. Bundee Aki (Connacht/Galwegians) 40 caps
*denotes uncapped player