His father Prince Charles will visit the Holy Mountain in Easter
A statement from Kensington Palace said the baby is expected in the spring of 2019
He responded during a visit to the Irish President's residence in Dublin
Watch the A-List arrivals
It follows reports in the Mail on Sunday that Ms Markle's father staged pictures for a paparazzi photographer
Where and when is the couple getting married?
The couple have enlisted Californian pastry chef and food writer Claire Ptak, owner of the Violet Bakery in east London, to make it.
They will be going to Ionian islands before the wedding
Palace officials announced Monday that Prince Harry is engaged to Meghan Markl
Does Meghan Markle know?