They took a commercial Aer Lingus flight to Dublin Airport to start things off. For the occasion, Kate donned a dark, emerald green coat by Catherine Walker, according to People, and a patterned Alessandra Rich dress that included a few shades of the color.
She accessorized with green pumps, a bright green clutch and a headband, one of her go-to accessories. William was a bit less bright, simply pairing a green tie with a navy suit.
After arriving at Dublin Airport, the two headed to the official presidential residence, Áras an Uachtaráin, where they met with Irish President Michael Higgins and his wife, Sabina Coyne.
During their visit, the Duke and Duchess of Cambridge plan to tour Dublin, County Meath, County Kildare and Galway.
Later on in the evening, the Duchess of Cambridge donned a shimmering gown for a reception that the British ambassador hosted at the Gravity Bar at the Guinness Storehouse.
The dress, made of iridescent emerald silk metallic chiffon, is from The Vampire’s Wife and retails for $2,076.
Kate and William’s time away from England overlaps with Prince Harry’s return to the U.K.
The Duke of Sussex came back last week to carry out his last engagements as a working member of the royal family. He stopped by a Scottish travel conference to promote Travalyst, the sustainable travel initiative he launched last year.
On Friday he joined Jon Bon Jovi to record a song with the Invictus Games Choir. Meghan Markle is expected to join him for the Endeavor Awards on March 5, and the two plan to attend the Mountbatten Festival of Music on March 7 at the Royal Albert Hall.
The last engagement for the Duke and Duchess of Sussex is Commonwealth Day Service at Westminster Abbey, where they are expected to join the queen, Prince Charles and Camilla, Duchess of Cornwall, as well as William and Kate.