Sinn Féin deputy leader Michelle O'Neill has confirmed she will attend the coronation of King Charles.
Ms O'Neill said she is an Irish republican but is committed to "representing the whole community" through "respectful and mature engagement".
The Assembly Speaker, Sinn Féin's Alex Maskey, will also attend the coronation of Charles and Queen Consort Camilla on May 6.
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Confirming her attendance, Ms O'Neill said: "I have accepted an invitation to attend the coronation of King Charles lll.
"We are living in a time of great change. A time to respect our differing and equally legitimate aspirations, a time to firmly focus on the future and the opportunities that the next decade will bring.
"I am an Irish republican. I also recognise there are many people on our island for whom the coronation is a hugely important occasion."
Ms O'Neill is poised to become First Minister if a Stormont power-sharing Executive is restored, as Sinn Féín became the largest party in the Assembly in last year's election.
She said: "I am committed to being a First Minister for all, representing the whole community, building good relations between the people of these islands, and advancing peace and reconciliation through respectful and mature engagement."
Former MLA Mr Maskey, a lifelong Irish republican who was twice interned during the Troubles, said he will be "pleased" to attend the coronation.
In a letter to MLAs, he said: "It has always been important for me, or indeed any Speaker, to conduct my responsibilities to represent the Assembly in a way that is inclusive and respectful of all the identities and political traditions within it.
"I therefore want to inform members that I am pleased to attend the coronation of King Charles III on behalf of the Assembly.
"The Assembly will also be formally represented at the coronation by the clerk/chief executive, Lesley Hogg."
Last year as Speaker of the Assembly, Mr Maskey led tributes on behalf of Northern Ireland to Queen Elizabeth II following her death aged 96.
He recalled MLAs to the Assembly to pay their respects to the Queen, and delivered a speech of condolence to Charles at Hillsborough Castle on behalf of the people of Northern Ireland.
A host of dignitaries, celebrities, heads of state and other royals are expected to attend the coronation at Westminster Abbey in London.
Irish president Michael D Higgins is among those set to attend the coronation, becoming the Republic's first head of state to attend the crowning of a British monarch.
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