The proclamation of the UK's new king has been read at Hillsborough Castle in Co Down.
The Norroy and Ulster King of Arms Robert Noel formally declared the accession of King Charles III following the death of Queen Elizabeth II.
Amid heavy rain, around 200 invited guests were inside the castle grounds, while hundreds more watched from under umbrellas outside the main gates.
Hillsborough Castle is the royal family's official residence in Northern Ireland, and the Co Down village was recently honoured with a 'Royal' prefix in recognition of its long-standing regal links.
The ceremony began with the Royal Irish Regiment (RIR) band leading a procession of a Proclamation Guard from the 2nd Battalion of the RIR and representatives of Lisburn and Castlereagh Council to the front of the castle.
Prior to the proclamation, a 40-second fanfare was sounded by a bugler.
A bell in the clock tower of the castle's Court House chimed once at 12pm to signal the start of the reading.
As Norroy and Ulster King of Arms, London-born Mr Noel is one of three senior officers of arms at the College of Arms in London.
Following the proclamation, a 21-gun salute was fired by the 206 (Ulster) Battery Royal Artillery.
After the last round, the bugler sounded a royal salute before the RIR band played a verse of God Save The King.
Mr Noel then invited guests to cheer three times for Charles.
Guests included Northern Ireland Secretary Chris Heaton-Harris and Northern Ireland Office minister Steve Baker.
DUP leader Jeffrey Donaldson, Alliance Party leader Naomi Long, Ulster Unionist leader Doug Beattie and Traditional Unionist Voice leader Jim Allister were also there.
Sinn Féin stayed away from the accession proclamation ceremony but said it will attend other official events during the period of mourning for the queen.
The party's vice president Michelle O'Neill and other senior party figures were at a rally in Belfast today for victims of the Troubles.
Sinn Féin president Mary Lou McDonald said the party did not attend the accession proclamation because it was "intended for those whose political allegiance is to the British Crown".
But she said party figures would be attending other events in the days to come.
She said: "Sinn Féin once again extends our condolences on the death of Queen Elizabeth, whose loss is felt deeply by her family, and many people across our society, particularly within the unionist community.
"We acknowledge the very positive role the Queen played in advancing peace and reconciliation between our two islands, and the two traditions on our island, during the years of the peace process.
"In recognition of this, Sinn Féin will attend a number of events during the ten days of mourning."
Sinn Fein confirms that Michelle O'Neill + other senior party members will attend a number of events mourning the death of Queen Elizabeth including a Motion of Condolence in Hillsborough + Service of Reflection in Belfast, both of which will be attended by King Charles @rtenews
— Vincent Kearney (@vincekearney) September 11, 2022
King Charles and Queen Consort Camilla will visit Hillsborough Castle on Tuesday, where they will view an exhibition about the late queen's long association with Northern Ireland.
The king will then meet Northern Ireland Secretary Chris Heaton-Harris and party leaders and receive a message of condolence led by the Speaker of the Northern Ireland Assembly.
After a short reception at Hillsborough, the royal couple will travel to St Anne's Cathedral for a service of prayer and reflection and before the event Charles will meet leaders from all the major faiths in Northern Ireland, and later the royal couple will return to London.
