The Duke of Cambridge's cousin Princess Eugenie - the daughter of the Duke of York and Sarah, Duchess of York - was also baptised there in 1990.
Prince Louis, the third child of Britain's Prince William and wife Kate, has been christened at a small, private ceremony overseen by close family but without his great-grandmother Queen Elizabeth. It was not due to ill health on the part of the Queen, a source said, with Her Majesty having a busy schedule in Scotland last week and London in the coming days, including the RAF centenary today and a visit from Donald Trump. According to the post, the Duchess of Cambridge was christened on June 20, 1982, which just so happens to be the day before Prince William was born. And Louis' non-royal godparents will have influence on the little prince.
Charlotte wore a pretty sleeveless floral sundress in pink, and she wore the same shoes as George, but in a cute pastel pink.
The appearance was particularly poignant as it was the time the Cambridge's appeared in public as a family of five.
She was heard describing her son as "very relaxed and peaceful", telling the archbishop with a smile: "I hope he stays like this".
Leaving the church with her family after the christening, the three-year-old looked up at the waiting paparazzi and told them that they weren't invited to the reception at Clarence House. James too wore a blue suit and light blue tie while Pippa co-ordinated in a light blue pleated Alessandra Rich dress with silver pumps and a headpiece. Welby recently officiated at the royal wedding of Prince Harry and Meghan, Duchess of Sussex, on May 19.
The Duke and Duchess of Cambridge chose hymns O Jesus, I Have Promised and Lord of All Hopefulness for the ceremony.
Kate Middleton at Prince George's christening.
The Duchess of Cambridge looked completely smitten with her youngest child, as she gazed lovingly down at the prince dressed in a replica of the gown commissioned by Queen Victoria for the christening of her daughter, Victoria, in 1841. The new version was made by the Queen's dresser, Angela Kelly.
In keeping with royal tradition, the water used for Louis' christening had been sourced from the River Jordan. He is fifth in line to the throne.
Nicholas van Cutsem is the brother of William van Cutsem who was selected as a godparent for Prince George.
They include Guy Pelly, once dubbed the "court jester" to William and Harry for his wild ways that were often cited as a bad influence on the brothers in their youth, running their favourite drinking haunts.