Ireland flanker Peter O'Mahony has signed a new three-year contract with the IRFU which will see him remain at Munster until at least June 2018.
O'Mahony has won 27 caps and has established himself as a vital member of Ireland coach Joe Schmidt's squad.
The 25-year-old is the Munster captain and skippered his country during the 2013 summer tour of North America.
He is one of a number of Irish players who have turned down a move to France to remain within the IRFU structures.
Toulouse are believed to be among the French Top 14 clubs who had expressed an interest in signing the back-row forward.
O'Mahony made his Munster debut against Ulster in January 2010 and has since made 68 appearances, scoring 10 tries.
He first played for Ireland in the 42-10 win over Italy in February, 2012 and was part of the side which defeated France 18-11 in Dublin last weekend.
IRFU Performance Director, David Nucifora, said: "Peter's performances for Ireland over the past few seasons have been exceptional. The esteem in which he is held by Irish rugby is reflected in the fact that at the age of just 25 he has already captained his country and province.
"Leadership is just one of the many qualities he brings to Munster and Ireland and we are delighted that he has committed to Irish Rugby."
Munster Chief Executive Garrett Fitzgerald added that the back-row forward "leads by example on and off the field and is a perfect role model for all aspiring young players".
"I look forward to working hard with my team mates, coaching staff and management to achieve continued success for both Munster and Ireland in the years ahead," said O'Mahony.