In what will be the biggest game of his life, Iain Henderson has been handed a vote of confidence from Joe Schmidt and will start tomorrow's crunch clash with England in Twickenham (2.45pm).
The Ulster lock had been nursing a hamstring injury but made his return from the bench against Scotland a week ago. And with what would be a third Irish Grand Slam on the line, the 26-year-old has displaced Devin Toner.
Schmidt said having Henderson hungry was all part of his plan.
"It is a plan over these two games that we would mix (second-row) selection up," said the Kiwi. "We almost did it the other way because James Ryan had a big game against Scotland, we thought he might benefit from coming off the bench and getting less time but we can still manage that with Dev anyway.
"Iain has got a little bit of time under his belt after having a couple of weeks off. He has progressed a little bit further and is more than ready to go."
Henderson brings Ulster's contingent in the starting line-up back to three alongside Rory Best, who won a Slam in 2009, and try-scoring sensation Jacob Stockdale.