Taoiseach Enda Kenny has met US President Barack Obama at the White House in the US.
He re-issued his invitation for Mr Obama to visit Ireland again in the future.
Mr Obama warmly welcomed the Irish delegation and acknowledged the economic progress that has been made in Ireland.
He praised the Taoiseach's stewardship of the economy, saying he provided great leadership and reiterated the common interest the two countries have in trade and investment.
He welcomed Ryanair's decision to buy more than 100 airplanes from Boeing.
Mr Kenny said immigration reform would be a major issue and he hoped to include the undocumented Irish in the United States as part of any settlement that may be reached in discussions here.
Mr Obama also had meetings with Northern Ireland First Minister Peter Robinson and Deputy Minister Martin McGuinness today.
The events took place today because St Patrick's Day fell on a Sunday this year.