Dublin - Ireland flyhalf Johnny Sexton has been cleared to play against Wales in Saturday's Six Nations showdown with Wales in Cardiff after passing a fitness Test on Tuesday.
Irish Assistant coach Richie Murphy confirmed that the on-form playmaker had trained fully on Tuesday, after recovering from hamstring trouble.
The news was a huge boost for the unbeaten Irish following previous injury all-clears given for Jamie Heaslip, Sean O'Brien and Jared Payne.
Number eight Heaslip has been on the comeback trail from a fractured vertebrae in his back, while O'Brien and Payne have both proved their fitness after concussion.
"Johnny took full part in training this morning, he has done all the team stuff and trained well," said Murphy.
"Everyone else has come through, Jamie trained Monday and Tuesday so he's fit and healthy and ready to go.
"And the two boys, Jared and Sean O'Brien both passed their return to play protocols.
"They have done contact today so as long as there's no reaction over the next 24 hours they are both fit and ready to go
"It looks like a full deck to pick from, and everyone is very upbeat, everyone enjoyed that session this morning, the intensity was right up there.
"Having everyone fit and healthy is a massive thing for the squad because it puts pressure on everyone.
"The environment gets a nice little buzz off that."
Sexton has been widely hailed as the world's form fly-half as Ireland have swept to a record-equalling run of 10 consecutive Test victories, including their opening three Six Nations games.
The 29-year-old limped out of the closing stages the 19-9 victory over England in Dublin on March 1, with doubts over his fitness still rife on Monday.
Joe Schmidt's side can take a giant leap towards a first Grand Slam in six years with victory over Warren Gatland's Wales in Cardiff.