The Queen, 92, was travelling back from Norfolk on Monday and has a busy week ahead, with celebrations marking the centenary of the RAF on Tuesday and US President Donald Trump's visit to Windsor on Friday.
She will attend high profile celebrations in central London marking the centenary of the RAF on Tuesday, and a visit by United States president Donald Trump in Windsor on Friday.
Welby, who will baptise the baby by pouring holy water from the River Jordan over his head, said the event would be "very nerve-wracking" but "a great privilege".More news: 'Orange Is the New Black's Season 6 Trailer Is Finally Here
Following the service, The Duke and Duchess of Cambridge will give a private tea at Clarence House. Prince Louis godparents are Lady Laura Meade, Hannah Carter, Lucy Middleton, Nicholas van Cutsem, Harry Aubrey-Fletcher and Guy Pelley.
Prince Louis was carried into the chapel by his beaming mother, wearing the handmade replica of the Royal Christening Robe, which in 2008 replaced the original which had been worn for all royal christenings since that of Queen Victoria's eldest daughter in 1841.
Prince Louis Arthur Charles of Cambridge was born on April 23 - St. George's Day, England's national day - at St Mary's Hospital in central London weighing eight pounds and seven ounces (3.8 kilogrammes).More news: Turns Out IHOP Didn’t Change Its Name To ‘IHOb’ After All
Kate's parents and siblings were also there, including her sister Pippa Middleton, who is pregnant.
The Cambridges have previously chosen close friends and confidantes for the role. He is fifth in line to the throne.
Prince Charles and Camilla also came out for the christening. George, who turns five next week, looked handsome in a white short-sleeved shirt with blue buttons, which appears to be the "Daniel" shirt by Amaia, which he also wore for Trooping the Colour this year.More news: England makes final four for 1st time since '90
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