The Taoiseach announced Ireland might agree to a new European treaty to keep Britain in the European Union.
Enda Kenny said Ireland will be prepared to support "reasonable" changes if it is needed to stop the UK from leaving.
Speaking to ambassadors in Dublin this morning, the Taoiseach said Ireland could back some limited changes to the way the EU works.
"We will give our backing, where possible, for reasonable adjustments - reasonable adjustments - in the operation of the European Union.
"But we will also be very candid if we are presented with proposals that we do not see as achievable or desirable."
"Friendship is predicated on openness and on honesty, and this will continue to underpin our approach."
Almost all of the major parties in Britain have promised to hold a referendum on pulling out of the EU after this year's general election.