With his arms by his side, he paraded and marched around the grounds of St Andrew's Church for the marriage of a childhood friend of his mother, the Duchess of Cambridge.
The adorable eldest children of Kate Middleton and Prince William participated in the wedding of one of Kate's closest friends, Sophie Carter, over the weekend, and, naturally, they stole the show.
Keen to coordinate with her two children, Kate, 36, wore a matching periwinkle blue coat dress by Catherine Walker, teamed with a floral headpiece by Jane Taylor. She looked thrilled as she wrangled her kiddos for portraits.
Meanwhile three-year-old flower girl Princess Charlotte, the bride's goddaughter, wore a sweet white dress with blue piping and circlet of flowers.
Prince William was also in attendance at the wedding, arriving in a traditional tailcoat - he entered the church alongside friends.
But there was no sign of their baby brother, Prince Louis. "He was having a great time, running around like the leader of the pack".
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"Charlotte wasn't enjoying being the centre of attention quite so much".
A spokesperson for Amaia Kids said: 'The picture was removed as it was not for publicity purposes in case it was wrongly used'.
Duchess Kate and Sophie were schoolgirls together at Marlborough College and Sophie is also one of Charlotte's godmothers.
In recent months, Prince George and Princess Charlotte have found themselves in a number of weddings, which included Prince Harry's wedding to Meghan Markle and Pippa Middleton to her longtime boyfriend.
Kate's parents, Carole and Michael Middleton and brother, James, were also guests at the wedding in Norfolk.
Duchess Kate, on the other hand, continues to smile as she watches the children play.