Prince William and Kate Middleton are set to baptise their third child Prince Louis later today.
The Archbishop of Canterbury is due to christen their 11-week-old son at 4pm today at The Chapel Royal in St James’s Palace.
Prince Louis Arthur Charles of Cambridge was born on St George’s Day, April 23, weighing 8lb 7oz.
Ahead of the Royal Christening later today, here’s everything you need to know about the event.
Prince William and Kate have announced their guests for the Christening.
The Queen and Prince Philip are NOT attending today’s ceremony – with the reason why as yet unclear.
But Prince Louis’ siblings Princess Charlotte and Prince George are expected to be in attendance.
The Prince of Wales and The Duchess of Cornwall will be joined by The Duke and Duchess of Sussex at the chapel.
Mr and Mrs Michael Middleton, Mr and Mrs James Matthews, and Mr James Middleton will also be present.
The godparents of Prince Louis and their spouses complete the guestlist.
The Cambridges announced their chosen Godparents today, on the day of the Christening.
The Godparents comprise of: Mr Nicholas van Cutsem, Mr Guy Pelly, Mr Harry Aubrey-Fletcher, The Lady Laura Meade, Mrs Robert Carter and Miss Lucy Middleton
Meghan Markle was rumoured to be in the running for the honour – but she was notably absent from the list.
The Christening robe
Prince Louis will wear the handmade replica of the Royal Christening Robe, made by Angela Kelly, Dressmaker to The Queen.
The Royal Christening Robe, of fine Honiton lace lined with white satin, was made in 1841 for the christening of Queen Victoria’s eldest daughter, Victoria, Princess Royal.
The original gown was subsequently worn for all Royal christenings, including that of The Queen, her children and her grandchildren, until the youngest of The Queen’s eight grandchildren, James, Viscount Severn.
The Queen commissioned Angela Kelly to make a hand-made replica of the Royal Christening Robe in order to preserve the original. James, Viscount Severn, was the first member of the Royal Family to wear this replica gown at his christening at the private chapel at Windsor Castle on 19th April 2008.
The Baptism Water
The Lily Font and water from the River Jordan will be used during the baptism.
The Lily Font is a silver baptismal font which was commissioned by Queen Victoria and Prince Albert in 1840 after the birth of their first child, Victoria, Princess Royal.
It was first used at The Princess Royal’s christening in 1841 and has been a feature of Royal christenings since then.
Following the service, The Duke and Duchess of Cambridge will give a private tea at Clarence House.
Guests will be served slices of christening cake, which is a tier taken from The Duke and Duchess of Cambridge’s wedding cake.
The Duke and Duchess of Cambridge’s wedding cake, designed by Fiona Cairns, was made from 17 individual fruit cakes and had eight tiers.
The cake was decorated with cream and white icing using the Joseph Lambeth technique.
There were up to 900 individually iced flowers and leaves of 17 different varieties decorated on the cake.
A garland design around the middle of the cake matched the architectural garlands decorated around the top of the Picture Gallery in Buckingham Palace, the room in which the cake was displayed during the wedding.