Ireland's new Ambassador to the US has presented his credentials to US President Donald Trump.

Mr Trump greeted Ambassador Dan Mulhall warmly and was said to have been "very positively disposed" to Ireland.

The two men discussed a range of issues including St Patrick's Day, immigration issues and the Irish undocumented, and the contribution that the Irish people have made to the US and the importance of the two-way bilateral economic relationship.

Mr Mulhall has taken up the posting in Washington having previously served as Irish Ambassador to the UK for four years.

The Waterford man has also represented Ireland in Malaysia and Germany, while he was Director-General for European Affairs at the Department of Foreign Affairs from 2005 to 2009.

Having studied modern Irish history at University College Cork, Mr Mulhall has also written two books on the subject.