Britain's Duke and Duchess of Sussex, Harry and Meghan, wore green as they spent their first day in Dublin as part of their first official overseas trip as a married couple.

Harry and Meghan's private chartered plane landed in Dublin Airport on Tuesday evening, with Britain's Ambassador to Ireland Robin Barnett and his partner Agnieszka Kepka greeting them as they got off the plane.

Meghan wore a green Givenchy dress - the same fashion house who designed her wedding dress – for the occasion, with her husband Harry also giving a nod to Ireland with his choice of green tie.

Before travelling to the British Ambassador to Ireland's residence at Glencairn for a summer garden party, the couple met Taoiseach Leo Varadkar at Government Buildings. 

When it was time to sign the visitors' book Harry wrote his name and joked that "I never sign big enough."

When Meghan signed her name with a flourish, Harry added, "Yours is much nicer than mine."

The garden party at Glencairn gave Meghan and Harry the opportunity to meet people from across Ireland's arts, sports, military and social enterprise sectors.