Deputy First Minister Martin McGuinness has confirmed he will meet the Queen again later this month when she visits Belfast.
The Queen and the Duke of Edinburgh are to come to Northern Ireland between 23 June and 25 June.
The Queen last visited Ulster in 2012 as part of her Diamond Jubilee celebrations.
On that occasion, Her Majesty and the former IRA leader, shook hands for the first time.
In April he toasted the Queen during a banquet at Windsor Castle as part of the state visit of Irish president Michael D Higgins.