In an Instagram post Saturday, the royal couple shared new photos of their 2-month-old son, Archie Harrison Mountbatten-Windsor, including a family portrait featuring Harry's father, Prince Charles; Camilla, Duchess of Cornwall; Harry's brother, Prince William; Catherine, Duchess of Cambridge; Meghan's mother, Doria Ragland; and Princess Diana's sisters, Lady Jane Fellowes and Lady Sarah McCorquodale.
"This morning, The Duke and Duchess of Sussex’s son, Archie Harrison Mountbatten-Windsor, was christened in the Private Chapel at Windsor Castle at an intimate service officiated by the Archbishop of Canterbury, Justin Welby," the caption read.
"The Duke and Duchess of Sussex are so happy to share the joy of this day with members of the public who have been incredibly supportive since the birth of their son. They thank you for your kindness in welcoming their first born and celebrating this special moment."
According to the post, Archie wore a "handmade replica of the royal christening gown which has been worn by royal infants for the last 11 years." Royal babies wore the original gown, commissioned in 1841, to their christenings until 2004.
Harry and Meghan, formerly known as Meghan Markle, welcomed Archie, their first child, in May.