The cream lace and white satin robe is a replica of the robe made for Queen Victoria's eldest daughter in 1841, which is now too delicate to be worn.
However, his great-grandmother the queen and her husband Prince Philip will not be among the guests, Kensington Palace said.
Prince Louis, the third child of Britain's Prince William and wife Kate, will be christened at a small, private ceremony overseen by the Archbishop of Canterbury later on Monday, but Queen Elizabeth will not be there, his father's office said.
The Duke of Cambridge and his wife Catherine, Duchess of Cambridge, arrive with their son Prince George at Chapel Royal in St James's Palace in central London on October 23, 2013, ahead of the christening of the three month-old prince.
Though royal christening's usually occur in Buckingham Palace, the chapel has a special place in the monarchy, having housed several important occasions.
British Defense Chief Says Russian 'Attack' Led to Woman's Death
The Kremlin said it would be " absurd " to suggest Russian Federation was involved in the death of Sturgess. Basu said 21 other people who have been screened for Novichok exposure have been given the all-clear.
What will Prince Louis wear?
There were 30,000 copies in the first run of AA Milne's classic tale of the lovable bear and his friends in Ashdown Forest, East Sussex.
There for the ceremony were Louis's grandfather the Prince of Wales, step-grandmother the Duchess of Cornwall and maternal grandparents Carole and Michael Middleton.
Lady Laura Meade is married to Prince William's close friend James, who is Princess Charlotte's godfather.
Kate's parents and siblings were also there, including her sister Pippa Middleton, who is pregnant.
Prince Harry and Meghan were in attendance.
'She loved all the old classics and Harry had the brilliant idea of starting a little library of first editions for Louis, Charlotte and George to enjoy as they get older.