Prince Louis
The baby boy wore a handmade replica of a family christening robe. The original was made in 1841 for Queen Victoria's eldest daughter. The replica has also been worn by Prince George and Princess Charlotte.
Kate Middleton
The Duchess of Cambridge gazed lovingly at her third child ahead of his christening. She stunned in an ivory McQueen ensemble and Jane Taylor hat.
Prince William
The Duke of Cambridge was on double duty as he held onto Prince George's and Princess Charlotte's hands.
Prince George
The 4-year-old prince donned a white shirt and blue shorts for his little brother's big day.
Princess Charlotte
The 3-year-old royal looked adorable in a blue dress and matching headband.
Prince Harry
The Duke of Sussex wore a snazzy suit and tie for his nephew's christening.
Meghan Markle
The Duchess of Sussex wore a green dress by Ralph Lauren and hat by Stephen Jones for her first royal christening.
Prince Charles and Duchess Camilla
The Prince of Wales and Duchess of Cornwall dazzled for the christening of little Louis.
Pippa Middleton
While she isn't a member of the royal family, she is Kate's younger sister. The proud aunt was all smiles as she attended the big event with her husband James Matthews. Soon, there will be another little one on the way. Pippa is pregnant with her first child.
Carole Middleton and Michael Middleton
Again, while they aren't members of the royal family, Carole Middleton and Michael Middleton are Kate's parents. The grandparents looked chic as they headed into The Royal Chapel at St. James's Palace.
James Middleton
Like the rest of the Middletons, James isn't a royal; however, he is Kate's little brother and the proud uncle of Louis.