It's a big day for the Duke and Duchess of Sussex, but an even bigger day for royal baby Archie.

On Saturday, Meghan and Harry's son Archie was christened, and the royal family shared two photographs on Instagram so people all around the world could join in celebration.

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"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 post from the Sussex Royal Instagram account began.

"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."

Though the names of the godparents remain private, the first photograph shows the Duke and Duchess of Sussex with family members, including Camilla, Duchess of Cornwall; Prince Charles; Meghan's mother, Doria Ragland; Prince William; and Duchess Kate.

The second black and white photograph shows a more intimate moment between Harry, Meghan, and Archie in the Rose Garden at Windsor Castle.

According to the photo caption, Archie carried on tradition and was baptized while wearing the "handmade replica of the royal christening gown which has been worn by royal infants for the last 11 years."

It's not often that the royal family shares family photos with the public, but when they do it's always a treat.