As expected Johnny Sexton is fit and starts for Ireland against Argentina in Sunday's quarter final.
Rob Kearney is at full back with Tommy Bowe and Dave Kearney on the wings and Keith Earls Robbie Henshaw in the centre.
Sexton is at out half with Connor Murray at scrum half.
Cian Healy is in ahead of Jack McGrath at Loose head with Rory Best and Mike Ross completing the front row.
Devin Toner is paired with Ian Henderson in the second row while Jordi Murphy, Chris Henry and Jamie Heaslip are the back row.
On the bench it's Richardt Strauss, Jack Mc Grath, Nathan White , Donnacha Ryan, Rhys Ruddock, Eoin Reddan , Ian Madigan and Luke Fitzherald .
Former Ireland coach Eddie O'Sullivan says O'Connell, O'Mahony and O'Brien are losses but one's we can overcome in this match...