What a magnificent (and elegant) way to welcome tiny Prince Louis to the faith and the royal family.
Catherine's father MichaelMiddleton, as well as her pregnant sister Pippa and her husband James Matthews, were also amongst those invited to the service.
His eldest sibling Prince George, 4, clutched his dad Prince William's hand and had his trademark look of vague distaste on his face (god I love this kid) while sister Princess Charlotte, 3, looked mostly confused. William was an usher in their wedding and James Meade is godfather to Princess Charlotte.
Van Cutsem is one of four brothers who have been close to William and Harry since they were little.
William and Kate asked six friends and family members to be Louis's godparents.
Harry Aubrey-Fletcher: He went to Ludgrove School and Eton with William and his father is the Lord Lieutenant of Buckinghamshire.
Next is Hannah Carter, an old friend of Kate Middleton's from Marlborough College who is married to Robert Carter. As after George and Charlotte's baptisms, guests will be served slices of the duke and duchess's wedding cake.
And finally, Middleton, is, as you'd expect, is a cousin of Kate's.
100 military aircraft to fly over Essex
Higgins before visiting an Irish emigration museum, a technology startup hub and Trinity College, Ireland's oldest university. She doubled back towards the child and shook his hand, before breaking out in a laugh as the little boy looked on, unsmiling.