However, his great-grandmother the queen and her husband Prince Philip will not be among the guests, Kensington Palace said.
Prince Louis' mother, the Duchess of Cambridge, was confirmed into the Church of England during a ceremony at the Chapel in 2011. "I love pleats", one wrote, and another added, "I love her outfit, she looks so good!" A royal source said it had been agreed some time ago that the queen would not attend and her absence was not due to any health issues.
The Queen, 92, has a busy week ahead, with high-profile celebrations in central London marking the centenary of the RAF on Tuesday and a visit by US President Donald Trump in Windsor on Friday. The Duke and Duchess of Sussex followed closely behind the pair.
Woman on oxygen tank dies after her power is cut off The reason for the New Jersey great-grandmother's death, per her family: PSE&G turned off her electricity due to an unpaid bill. Her daughter Desiree said energy provider PSEG shut off her mother's service because she had fallen behind on payments.
Prince Harry and MeghanDuchess of Sussex at the christening of Prince Louis at the Chapel Royal, St. James's Palace.
The intricate lace gown is a royal family heirloom - a replica of the original worn by Queen Victoria and Prince Albert's eldest daughter, Victoria, during her baptism.
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.
Also attending are Kate's parents, her brother and sister and Louis's six godparents, who are close friends or relatives of William and Kate.
Louis´ other godparents are: Nicholas van Cutsem, whose family is close to the royals; William´s school pal Harry Aubrey-Fletcher; Laura Meade, who is married to William´s close friend James Meade; Kate´s schoolfriend Hannah Carter; and the duchess´s cousin Lucy Middleton.