Prince Louis is being christened on Monday at The Chapel Royal on the grounds of St. James’s Palace.
Many members of the royal family are there to celebrate the momentous occasion. In addition to the proud parents, Prince William and Kate Middleton, the child’s older siblings, Prince George and Princess Charlotte, are there. Prince Charles and Duchess Camilla are also in attendance as are Prince Harry and Meghan Markle. Of course, the Duchess of Cambridge’s family is there, too. Her parents, Carole Middleton and Michael Middleton, are attending as is her brother James Middleton. Sister Pippa Middleton, who is pregnant, and her husband James Matthews are there, as well.
However, Queen Elizabeth II and Prince Philip are not expected to attend.
The young royal will be christened by the Archbishop of Canterbury, the Most Reverend Justin Welby—the same person who performed Princess Charlotte and Prince George‘s christenings. He also officiated Harry and Meghan’s wedding vows in May and baptized the Duchess of Sussex in March.
Before the christening begins, here’s a look back at other royal christening throughout the years.
This isn’t the only tradition William and Kate are expected to uphold. They’re also expected to serve their guests christening cake, which is actually a tier from their royal wedding cake.