The wife of the North's First Minister Peter Robinson is expected to attend the State banquet for Queen Elizabeth in Dublin this evening.
Iris Robinson has not been seen at a public event since news emerged of her affair with a young man last year.
The dinner at Dublin Castle will be the only time during the Royal visit that the monarch will make an official speech.
Former Advisor at the Republic's Department of Foreign Affairs Gerry O'Connor has said Mrs Robinson's appearance tonight will draw attention.