The Duke and Duchess of Cambridge have landed in Dublin ahead of a three-day trip around Ireland.
William and Kate were said to be looking forward to building a lasting friendship with the Irish people during their first official visit to the country.
The couple flew to Dublin Airport on a commercial Aer Lingus flight with dozens of residents returning home, business travellers and tourists.
In brilliant winter sunshine they walked down the aircraft’s steps and were greeted by a small group of dignitaries led by Britain’s ambassador to Ireland, Robin Barnett.
The duchess looked stylish in an emerald green Catherine Walker coat and an Alessandra Rich dress, while the duke wore a suit.
Nearby was a large police presence and a motorcade waiting to take the couple to the city centre.
After heading to Aras an Uachtarain, William and Kate were greeted at the front door by Mr Art O'Leary, the Secretary General to the President.
The royal couple were then welcomed into the State Reception Room by the Aide-de-Camp to President Michael D Higgins.
President Higgins invited the Duke and Duchess of Cambridge to sign the Distinguished Visitors' Book.
The royal couple also spent some time with Mr Higgins in the President's Study before the bilateral meeting in the Drawing Room.
During the meeting, Mr Higgins was joined by his wife Sabina, Mr O'Leary, the Irish Ambassador to the UK Adrian O'Neill and Claire Power, the president's adviser.
Kate and Will were joined by the British Ambassador to Ireland Robin Barnett and Simon Case, the Duke of Cambridge's private secretary.
Mr Higgins and his wife Sabina accompanied Kate and Will to the Peace Bell.
The president explained to the couple that the bell was unveiled in 2008 by then president Mary McAleese to mark the tenth anniversary of the Good Friday Agreement.
The bell, dating back to the 19th century, is supported by two oak trunks which came from Shane's Castle Demesne in Co Antrim and from the Glencairn area in Co Dublin. The couple then rang the Bell.
Mr Higgins also pointed out the sculpture The People's Acorn by artist Rachel Joynt, which was unveiled as part of the State 1916 centenary commemorations.
One of the president's dogs, Brod, also accompanied them.
The Duke and Duchess of Cambridge received a round of applause as they entered the Garden of Remembrance in Dublin.
They walked along the edge of the open space's large pool, created in the shape of a non-denominational cross designed to be inclusive of all religions and creeds.
Crowds had gathered along the perimeter fence and a cheer came up when the couple were spotted by the spectators who had been waiting patiently for more than an hour.
The garden was designed by Daithi Hanly and the section where the wreath laying took place featured a large sculpture by Oisin Kelly, based on the theme of the Children of Lir, the Irish story about four children turned into swans by their stepmother jealous of their father's love.
The floral tribute was laid at the base of the towering artwork by two servicemen and the couple stood in contemplative silence for a minute, eyes fixed on the wreath.
When the Queen made her historic visit to Ireland in 2011 - the first by a British monarch since Ireland gained independence from Britain - she bowed her head during a visit to the garden as a mark of respect for those who died.
The duke and duchess left a message on the wreath which read: "May we never forget the lessons of history as we continue to build a brighter future together."
The royal then arrived at the Government Buildings in Dublin city centre.
Kate and Will were greeted on the steps of the Upper Merrion Street building by Taoiseach Leo Varadkar and his partner Matt Barrett before heading inside to have a meeting with the Taoiseach.
William and Kate are expected to sample a pint of Guinness later today.
At the Gravity Bar in the Guinness Storehouse, the couple are due to meet a range of people from the creative arts, sport, business and charity sectors.
During their three-day visit William and Kate will also visit counties Meath, Kildare and Galway.