Ireland international lock Devin Toner has signed a three-year contract with the Irish Rugby Football Union.
The deal, announced jointly by the IRFU and his provincial team Leinster, will see him remain with Leinster until at least June 2020.
Toner, 30, is an integral part of the successful Ireland set-up under head coach Joe Schmidt.
The 42 times-capped forward featured in Ireland's RBS 6 Nations title-winning teams of 2014 and 2015, and helped Ireland recently beat New Zealand and Australia.
His equally-impressive Leinster career, meanwhile, has produced European Cup and PRO12 title successes.
IRFU performance director David Nucifora said: " Devin is a top-class international second-row and has grown into a leader for both Ireland and Leinster.
"His performances for Ireland over the past number of seasons have been outstanding, and he continues to show growth and an appetite to develop his game."
And Toner added: " I am delighted to have re-signed with the IRFU and Leinster.
"There is a huge amount of talent coming through at Leinster, and it is a really exciting time to be involved with the province.
"T here is a real opportunity to be successful at both provincial and national level over the coming years, and I look forward to playing a part in helping to achieve that success."