The Taoiseach has sent his congratulations to the Irish team and staff involved in today's Six Nations victory.
Enda Kenny said "following Wales' comprehensive victory over Italy today, the task faced by Paul O'Connell and his warriors was enormous, but the guile and flair shown by the Irish team was a sight to behold.
"I want to congratulate them on behalf of the Irish people, and the Government, on their victory and thank them sincerely for providing such excitement and joy to Irish sports fans at home and abroad. We look forward now with hope and confidence to the World Cup later this year."
CHAMPIONS! #COYBIG
— Enda Kenny (@EndaKennyTD) March 21, 2015
They've retained their title because of points difference, which was confirmed after England failed to beat France by 26 points or more.
England were 55-35 winners over the French at Twickenham, while Ireland beat Scotland 40-10 at Murrayfield beforehand.
Wales also ended on 8 competition points, after a 61-20 win in Italy.
Enda Kenny says the "flair shown by the Irish team was a sight to behold".
These fans were at Murrayfield Stadium after Ireland were crowned Six Nations champions:
Download the brand new OffTheBall App in the Play Store & App Store right now! We've got you covered!
Subscribe to OffTheBall's YouTube channel for more videos, like us on Facebook or follow us on Twitter for the latest sporting news and content.