The programme will include official meetings with The President of Ireland, Michael Higgins, and with The Taoiseach, Leo Varadkar.
However, Prince Harry's bride had no brooch or bejewelled accessory in sight on her dress - the only member of the royal family to not wear one to the ceremony. She started the day in London in a custom Dior dress, landed in Ireland wearing a green Givenchy number, then slipped into an LBD by Emilia Wickstead for an evening reception.
When it came to her accessories the newly-wedded royal stuck simple black accents in the form of a suede shoe and an oversize leather handbag.
The Duke and Duchess of Sussex began their first official global visit together when they arrived in Ireland on Tuesday.
The wife of Prince William complemented her McQueen outfit with the Dacre brooch, an eye-catching bejewelled ornament that sat on the left lapel of her dress.
They will also visit the Book of Kells as well as Guinness Storehouse and the Dáil.
They will also visit Trinity College, the Famine Memorial and the Irish Emigration Museum over the course of their stay.
As they stood outside the Marlborough House, Meghan affectionately touched Harry's hand, as the pair appeared to share a joke.
Highlights of the short two-day trip include a Gaelic sports festival at Croke Park, the home of the Gaelic Athletic Association.