Update: The one-year anniversary of the Paris attacks was observed during a Remembrance Sunday ceremony at Glasnevin ceremony in Dublin today.
A special monument to honour the French and Irish men who fought together during the first and second world wars was officially unveiled during this afternoon's service.
The sculpture was crafted by students at l'Ecole Nationale Superieure des Beaux-Arts in Paris.
Minister for Arts and Heritage Heather Humphreys, said some of the students involved in the project lost a friend in the attack on the Bataclan music venue in Paris last year.
Moments of silence have been held at ceremonies to mark Remembrance Sunday.
The services in Dublin, Belfast, Enniskillen and across the UK are held to remember veterans and war survivors.
The Taoiseach and Tánaiste have laid wreaths at cenotaphs in Northern Ireland, while Minister Heather Humphreys has attended a ceremony at Glasnevin Cemetery.
Wreaths will also be laid in memory of those who lost their lives in two world wars and other conflicts.
Meanwhile in London, a two-minute silence led by the Queen has been held to honour the war dead as the nation's leaders gathered at the Cenotaph on Remembrance Sunday.
The Queen was joined by Prime Minister Theresa May for the annual service in central London in memory of those killed in past and present conflicts.
More than 750 Armed Forces personnel were applauded by the gathered crowd as they marched to form a hollow square around the memorial.
As Big Ben struck 11am, the King's Troop Royal Horse Artillery fired their First World War-era guns to mark the beginning and end of the reflection in the heart of Whitehall. The Last Post was then sounded.
Dressed in black, the Queen laid a wreath of poppies at the memorial for "The Glorious Dead" while Mrs May and leader of the Opposition Jeremy Corbyn followed suit.
In keeping with tradition, the Queen was joined by senior members of the royal family including the Duke of Edinburgh and Prince of Wales, who also laid wreaths.
The Duchess of Cambridge, Duchess of Cornwall and other royals watched on from the balcony of the Foreign and Commonwealth Office (FCO).
Crowds of poppy wearers lined Whitehall, which was closed to traffic, hours ahead of the service to pay their respects.
This year's service is especially poignant as 2016 marks the centenary of the Battle of the Somme and the Battle of Jutland, the 25th anniversary of the Gulf War and the 80th anniversary of the first flight of the Supermarine Spitfire.