"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," the caption read.
The Sussex Royal account announced Saturday morning Archie Harrison Mountbatten-Windsor was christened at Windsor Castle in a private ceremony, sharing two new photos of the adorable royal baby in the process.
The first photo, a royal family group shot, featured Archie with his relatives including Prince Charles, Prince William, Kate Middleton, Meghan's mother Doria Ragland and Lady Jane Fellowes and Lady Sarah McCorquodale, sisters of Prince Harry's mother, Princess Diana.
The adorable post included a second photo, which showed Prince Harry and Meghan embracing their beautiful son. This is the first time royal fans are able to get a really good glimpse of baby Archie, who was born on May 6.
"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," it continued. "They thank you for your kindness in welcoming their first born and celebrating this special moment."
The account added, "Their Royal Highnesses feel fortunate to have enjoyed this day with family and the godparents of Archie."
The caption also shared details about Archie's christening, including his special gown.
"Their son, Archie, was baptised wearing the handmade replica of the royal christening gown which has been worn by royal infants for the last 11 years," the post read. "The original Royal Christening Robe, made of fine Honiton lace lined with white satin, was commissioned by Queen Victoria in 1841 and first worn by her eldest daughter."
The post continued, "It was subsequently worn for generations of Royal christenings, including The Queen, her children and her grandchildren until 2004, when The Queen commissioned this handmade replica, in order for the fragile historic outfit to be preserved, and for the tradition to continue."
Congrats to the Duke and Duchess of Sussex on this special day.
Got a story or a tip for us? Email TooFab editors at email@example.com.