Prince Louis was christened at the Chapel Royal at St. James Palace in front of many members of the royal family on Monday, July 9.
Other notable guests there to toast Prince Louis were Prince Charles and Camilla, Kate's parents Carole and Michael Middleton, her sister Pippa and her husband James Matthews, and hot bearded Middleton brother James.
After arriving at Dublin City Airport, Harry and Meghan were due to meet with Irish Prime Minister Leo Varadkar.
Those who met them said that they praised Belfast people saying that they were "so friendly and warm".
Prince Louis Arthur Charles of Cambridge, fifth in line to the throne, was born on St George's Day, April 23, at the private Lindo Wing of St Mary's Hospital in Paddington, London, weighing 8lb 7oz.
Princess Charlotte is proving, yet again, that she's nailed the royal wave technique.
The princess and her brother Prince George held hands with their father, Prince William, the Duke of Cambridge.
Lady Laura Meade: Also one of Princess Charlotte's godparents, Lady Meade is the wife of Prince William's close friend and fellow Etonian James Meade, known as "Meadey".
Welby will use the Lily Font, commissioned by queen Victoria for the baptism of her first child in 1841. For Prince Harry and Meghan Markle's first-ever official overseas tour in Dublin, Ireland , which kicked off on Tuesday (July 10), the couple have an fantastic team of 11 people to be sure that not a moment, tweet or strand of hair goes amiss.