Brian Cowen has led the tributes to Gordon Brown after the British Prime Minister resigned following the recent election.
The Irish Premier described Mr Brown as a very good friend to Ireland throughout his career in Government.
"He showed his commitment to peace in Northern Ireland and to positive British-Irish relations in his extraordinary personal contribution to the talks that led to the Hillsborough agreement earlier this year," the Taoiseach said.
"He has also provided strong and insightful international leadership in the global economic crisis and in the fight against poverty and disease around the world.
"I know that he has always tried, in all he has done, to work for the good of everyone in British society.
"I wish him well for the future and look forward to working with his successor."