Leinster forward Devin Toner has signed a two-year contract with the Irish Rugby Football Union.
The IRFU said that 20 times-capped Toner's new deal will see him remain at Leinster until at least June 2017.
The 28-year-old made his Test debut against Samoa in 2010.
IRFU performance director David Nucifora said: " Devin has developed into an international level second-row over the last few seasons.
"He has performed consistently at a high level for both Ireland and Leinster, and is illustrating strong leadership skills in both the provincial and national environments."
Toner added: "I t is great to have signed on for another two years with Leinster.
"I have been with the province for almost a decade and during that time the club have invested a lot in my development and have given me the platform to reach my potential and achieve success at both provincial and national level."